Sorry for butting in, here's a couple from inside the terminal before they get to you guys.
"Is the flight late?" - "No, but the schedule is a little early".
"Where's gate 7?" - "Just below the gate 7 sign".
And now for one of my favourites.....
"Are you boarding yet" - "No, it's all my own hair!".
That's my input, I'll leave now.