When planning a trip to Vegas, it's not uncommon for me to book the first decent deal that comes along, then keep an eye out for a better deal and rebook. When I call to cancel the existing reservation, I always wonder if I should try and rebook the better deal right then while I'm on the phone, but I never do it. It makes me feel sketchy for some reason. I just wait until I get confirmation of the cancellation, then go online and rebook the second (or sometimes third) offer. How does everybody else rebook? I'm sure the reservation agents could care less, but I wonder if properties don't encourage them to keep people at higher rates somehow. Maybe I'm over thinking it.