This is a simple fb opener i use before i send a friend request to her. I don't know someone else use this kind of messaging before adding her as a friend, i use this because there is no guarantee that she id going to accept my friend request!
Me: Heyy, i think yu knw my friend!
(obviously, i may not know some one she is friends with)
she may reply with something lyk
Her: who?/ i don't think so / which friend??/ do i know you? / something else
i may reply sumthing lyk
me: I'm not sure if its you, but, he told you are from <scul or college name> (i use scul or college name that she is not studying in)
her: no, I'm not, u have mistaken!
Me: yaa, but hey, u seem funny/cool, we can be friends, I'm gonna add you
(or some thing like that message,
i want to be on her friendslist first)