Here's MY favourite:
"Are we there yet?"
"No."
"Well, what about now?"
"No, we STILL aren't there yet."
"Ummm. Now?"
"Go back to the galley and make me a drink."
or.....
"What time are we getting in?"
"I just made a PA, didn't you listen?"
or....
"Chicken or beef?"
"Is that like, leather or feather? Hehe...." (Joking... trying to lighten things up a little...)
"Umm, no, it says here, 'chicken' or 'beef' "
"sigh.....wha-aaat ev-er"