Not sure if this idea exist. Possible to have a note for every groupchat that the admin can edit as sometime group chat intend to have flood of text and some people might not read everything. so it will be best if we can have the admin edit a Note for the thing people have confirmed etc. Date of Dinner , Date for meeting. So people in the chat can just maybe type @memo or @note to retrieve note of that particular group chat that the admin had set.
Sorry for the bad english