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.