In case you want to delete a conversation, you can use the deleteConversation() method. This method takes two parameters. The unique id (UID/GUID) of the conversation to be deleted & the type (user/group) of conversation to be deleted.
String conversationWith = "UID";
String conversationType = CometChatConversationType.user;
await CometChat.deleteConversation(conversationWith, conversationType,
     onSuccess: (String str){
       debugPrint("Conversation deleted successfully at : $str");
     },
     onError: (CometChatException e){
       debugPrint("Conversation deletion failed : ${e.message}");
		}
);
This method deletes the conversation only for the logged-in user. To delete a conversation for all the users of the conversation, please refer to our REST API documentation here. The deleteConversation() method takes the following parameters:
ParameterDescriptionRequired
conversationWithUID of the user or GUID of the group whose conversation you want to delete.YES
conversationTypeThe type of conversation you want to delete . It can be either user or group.YES