1) I start a new messages conversation (not chat)
2) My friend answers me
3) We are writing to each other (it is all ok).
4) I delete our conversation (when I think it is over).
5) My friend tries to write to me in that conversation, but I cant recive any messages.
Logics: When I delete conversation in my inbox, I must get a NEW message from friend who writes me in the old conversation from his inbox.