You can delete individual chats or groups from your conversation list at any time.

Delete a chat or group
  1. In the chat list, swipe the chat to the left.
  2. Tap More.
  3. Select Delete Chat (individual) or Delete Group (if you have permissions).
  4. Delete for me or Delete for everyone.

Quick alternative:

  1. Long press the chat in the list.
  2. Select Delete Chat or Delete Group.

Important: Deleting "for me" only removes the chat from your device. Other participants will still have the conversation.