Implement "End Chat" feature and UI element (X) in Teams 1:1 Chat & Group Chat to enable bots /participants to detect end of conversation
Unlike Skype for Business or other chat clients, there is no UI element to actually "close" a 1:1 chat.
While it makes sense for channels/teams which are persistent, this breaks many bot scenarios specially in customer service where the remote party/bot needs to know that the user has discontinued the conversation.
In SfB, this triggers a specific SIP message that indicates to the remote participant, including UCMA Bots, that the user has closed the conversation. There is no such capability in Teams