> ## Documentation Index > Fetch the complete documentation index at: https://docs.chat.voicebot.studio/llms.txt > Use this file to discover all available pages before exploring further. # Restart Conversation > If this is a WhatsApp conversation it is possible to restart the conversation by calling this endpoint. A WhatsApp template message will be sent asking the customer if they want to continue the conversation. The template is a marketing message and will cost about 11 cents. This opens up a new 24 hours window for chatting as soon as the customer replies with anything (even "No"). See the "Important" hint in the description of the reply_until field in this document! The conversation must have expired before. ## OpenAPI ````yaml api-reference/openapi.json post /conversations/{id}/restart openapi: 3.0.3 info: version: 0.1.0 title: Client API servers: - url: https://1-some-client.some-server.healvi-chat/third-party/v1 security: - bearerAuth: [] paths: /conversations/{id}/restart: post: tags: - conversations summary: > If this is a WhatsApp conversation it is possible to restart the conversation by calling this endpoint. A WhatsApp template message will be sent asking the customer if they want to continue the conversation. The template is a marketing message and will cost about 11 cents. This opens up a new 24 hours window for chatting as soon as the customer replies with anything (even "No"). See the "Important" hint in the description of the reply_until field in this document! The conversation must have expired before. parameters: - in: path name: id schema: type: integer required: true responses: '200': description: Success content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/Message' components: schemas: Message: description: A message within a conversation. type: object properties: id: type: integer description: Internal ID. conversation_id: type: integer description: Foreign ID of related conversation. from: $ref: '#/components/schemas/MessageFrom' source: $ref: '#/components/schemas/MessageSource' user_id: description: Id of user who created this message. type: integer nullable: true contents: description: > A message can contain multiple contents when receiving. Usually it is just one item. For example when sending multiple contacts with WhatsApp, it will generate one message with multiple contacts within the contents array. When sending, only one item in the array is allowed. type: array items: anyOf: - $ref: '#/components/schemas/TextMessageContent' - $ref: '#/components/schemas/ImageMessageContent' - $ref: '#/components/schemas/VideoMessageContent' - $ref: '#/components/schemas/AudioMessageContent' - $ref: '#/components/schemas/DocumentMessageContent' - $ref: '#/components/schemas/LocationMessageContent' - $ref: '#/components/schemas/ContactMessageContent' minLength: 1 status: $ref: '#/components/schemas/MessageStatus' agent_reaction: description: String containing a single emoji. type: string nullable: true customer_reaction: description: String containing a single emoji. type: string nullable: true sent_at: description: Datetime when message was sent. type: string format: date-time nullable: true example: '2023-01-01T12:00:00Z' reference: description: Reference of a message within the same conversation allOf: - $ref: '#/components/schemas/Message' nullable: true latest_error: description: Contains the latest error if something went wrong. allOf: - $ref: '#/components/schemas/MessageError' nullable: true whatsapp_campaign: description: >- If "source" is "whatsapp-campaign" then this will be the campaign which created this message. allOf: - $ref: '#/components/schemas/WhatsappCampaign' nullable: true MessageFrom: description: Who wrote the message. type: string enum: - system - agent - customer MessageSource: description: What triggered the message. type: string enum: - user - whatsapp-campaign TextMessageContent: description: Simple message content containing text. type: object properties: type: type: string enum: - text content: description: The content of the text message. type: string ImageMessageContent: description: Message content containing an image. allOf: - $ref: '#/components/schemas/FileMessageContent' - type: object properties: type: type: string enum: - image caption: description: Caption of image. type: string nullable: true VideoMessageContent: description: Message content containing a video. allOf: - $ref: '#/components/schemas/FileMessageContent' - type: object properties: type: type: string enum: - video caption: description: Caption of video. type: string nullable: true AudioMessageContent: description: Message content containing an audio recording. allOf: - $ref: '#/components/schemas/FileMessageContent' - type: object properties: type: type: string enum: - audio voice: description: True if audio is a voice recording. type: boolean DocumentMessageContent: description: Message content containing a document. allOf: - $ref: '#/components/schemas/FileMessageContent' - type: object properties: type: type: string enum: - document filename: description: Name of document. type: string nullable: true caption: description: Caption of document. type: string nullable: true LocationMessageContent: description: Message content containing a GPS location. type: object properties: type: type: string enum: - location latitude: type: string longitude: type: string address: type: string nullable: true name: description: Name of the place. type: string nullable: true url: type: string nullable: true ContactMessageContent: description: Message content containing a contact. type: object required: - name properties: type: type: string enum: - contact name: type: object required: - formatted_name - first_name properties: formatted_name: type: string first_name: type: string nullable: true middle_name: type: string nullable: true last_name: type: string nullable: true prefix: type: string nullable: true suffix: type: string nullable: true birthday: type: string format: date nullable: true example: '1970-01-01T00:00:00.000Z' phones: type: array items: type: object properties: phone: type: string type: type: string emails: type: array items: type: object properties: email: type: string type: type: string addresses: type: array items: type: object properties: street: type: string city: type: string state: type: string zip: type: string country: type: string country_code: type: string type: type: string org: type: object properties: company: type: string department: type: string title: type: string MessageStatus: description: >- Status of message. Created messages have not been sent yet via external API. type: string enum: - created - sent - delivered - read - error MessageError: description: Error description when something went wrong sending/receiving a message. type: object properties: id: type: integer description: Internal ID. message_id: type: integer description: Foreign ID of related message. type: type: string enum: - status-update - other original_message: description: Error message from bridge or messenger service. type: string created_at: description: Datetime when error was created. type: string format: date-time nullable: true example: '2023-01-01T12:00:00Z' WhatsappCampaign: description: WhatsApp campaign (marketing). type: object properties: id: type: integer description: Internal ID. name: description: Name of campaign. type: string FileMessageContent: description: Base object for message content having a file. type: object properties: has_file: type: boolean enum: - true uuid: description: Unique UUID of file. Used to retrieve file data from server. type: string name: description: Name of file. nullable: true mime_type: description: Type of file. type: string example: audio/ogg size: description: Size of file in bytes. type: integer download_url: description: URL to directly download the file. Token still needed. type: string public_download_url: description: >- URL to directly download the file without a token. Use at your own risk. type: string securitySchemes: bearerAuth: type: http scheme: bearer ````