What do you want me to call you?
In J on SU the Chief Cabin (as their name badge says) comes around and introduces herself and asks what she should call you? The first time this happened I was so astonished I said "John". On the second flight I tried to avoid an answer but the request became an interrogation and I had to tell; on the third both the man in the next seat and myself managed to distract her enough to avoid giving an answer.
I find this odd as they already know my name and can easily use Mr Greenpen as a perfectly appropriate form of address. Incidentally, on both occasions I gave the name I should be called she never actually used it at any time during the rest of the flight.