I find it so aggravating when people say, "I'm not sure what the issue is just ___." As if there are no possibilities of alternate situations that would warrant someone asking. In my situation, I booked a cruise for my friend and I. She is traveling with an enhanced license that states her first name then, since she has 2 middle names, the first middle name and the first letter (only) of her second name. The cruise booking agent thought it best then just to use her first and last name because it was so rare. That said, for the folks who always quip back, "Just get a passport," it isn't always an option. I am not her keeper and can't make her get one. So, there are many situations that don't fit "Just book under the name on your ID or passport."