Do you know...

I hate it when you give a customer the information they requested and they act like you are lying to them. She acted all disgusted so I'm sure she will call back and try and get another agent who can tell her what a Junior Suite in Barcelona Spain is.

Or the ever popular: "Oh no, I'm looking at it right here on the hotel's website. It says it's X dollars cheaper". And as agent X says politely, "Well then, book it there!"