Please, gentlemen. Please stop calling from the middle of the lobby, talking loudly, using my name, mentioning our appointment, and/or repeating the room number. You should be calling from your car. This is very indiscreet. I kept thinking it was a foolish error by a couple of slightly dense individuals, but it has been happening too frequently. I kid you not, I have realized a gent was calling me from the lobby and specifically told him not to repeat the room number, and I bet you can guess what happened. Two different guys.
And everyone that has done this and been told their appointment was canceled then tried to lie and say "Well, I wasn't actually in the lobby" or something similar. That's not going to help you.
I've now had to ask my assistant to include a note about this when scheduling appointments. I hate listing off instructions like this, as I certainly feel like it is a bit patronizing, but it does seem to be necessary.
Sorry for the rant. I'm just a bit frustrated.
TL;DR = Calling from the lobby will get you a serious case of blue balls. Call from the car.