Hello. Is there a plugin I can buy where users can visit other user's profiles and leave notes on their profile that only they can see.

Example. User1 is chatting with User2. User 2 tells them some personal information which User 1 can store on User 2 profile so they don't need to remember it (name etc.) so User 1 can go to that person's profile and see the note they left for that person.

That would be very useful for me. Thanks.