I KNOW this is probably a very stupid question, but I really want our next trip to run as smooth as possible. I have downloaded from a couple places some little printable vacation planning 'worksheets' and on all of the checklists before you leave, it says to confirm your flight reservations with the airline. I've NEVER confirmed anything with anyone before- I've just bought the airline tickets online, printed out my receipt with reservation number and headed on out to the airport and I've never had any problems. Can someone please tell me why you would do this, or if you need to this? And please no rude remarks, I realize this is a silly question!