Hello. Suggestion is to allow user to delete messages and conversation on both sides. If conversation between users and user2, so user1 can delete his message and make it invisible for user1 and user2 too. Like in Telegram.

Hello. Users ask:
1) is it possible to delete conversation for all users? If conversation between user1 and user2 and user1 delete conversation, it also deleting for user2.
2) is it possible to delete message in conversation (for both users user1 and user2);
3) is it possible to edit message?
Thanks.