Want to get whatever you want in life? Try out this technique.
Approach the person you're asking for a favor . . . like, say, the airline employee at the desk. Give your name, and make your request. If they say no, smile and say, "Well, I'm sure we can find a way to work things out."
Then stand off to the side in their peripheral vision . . . lean forward a little . . . clasp your hands in front of your stomach . . . smile . . . and NEVER STOP LOOKING AT THEIR FACE.
Don't speak unless they ask you a question. Nod enthusiastically whenever the person says something to someone else.
Eventually, they'll help you because you look nice, friendly, respectful, non-threatening.
A body language expert nicknamed the pose "kindly brontosaurus" . . . because you're kind of craning your neck and holding your arms like a brontosaurus.
Here's a photo of someone doing the "kindly brontosaurus."
I think she looks a little creepy.