Another failure to communicate

ME: Okay, and what's your room number?
CALLER: Ummm, uhhh...
ME: That's okay, not every room has a number.
CALLER: Okay.
ME: Would your room happen to have a title?
CALLER: *immediately* Oh! That's F-one-eleven-dash-two!
ME: *hiding sarcasm* That's the title?
CALLER: Oh yeah.