I'm flying to Japan on Friday to learn a new process for our company. They are so generous as to fly me in coach. And at about 14 hours it will be a very loooong trip. I'm tempted to pay out of my own pocket for an upgrade to business class. But for some reason I seem to recall that if there are seats available and you know who or how to ask, that you can sometimes get an upgrade for little to nothing. Can any well travelled individuals share any secrets about this? Thank You very much.