If your name is Dave, Mike, John, Bill, Bob, or anything else that is very common, I suggest you make up another name to use for pooning. Pick one that is a little bit unusual and your risk for a mix up goes waaaaay down.
At one point I used to have SIX REGULARS all named Dave. If one Dave walks in when another Dave booked the appointment, how am I supposed to know?
Me: 'Did you book an appointment?'
Him: 'Um... yeaaaahhh '
If you do have a common name and you find a girl you plan on seeing regularly, ask her if she has any other clients with the same name. If she does, then the two of you can work out a different name to use for booking appointments that she will recognize as you. Trust me, this will save alot of potential trouble!