when I have had to cancel, I always offered either 100 off or extra time...was not talked into it, just did it. I figured you would reap what you sow, but I can't count the number of times dickwads book and cancel just to do so.
Give to get, or stfu. If you can't respect that a provider is OUT of money regardless of your excuse, there is not much else to say. It makes no difference "what" that excuse is...you SAVED the fee you would have paid anyway, whilst she is out of it plus more. If your work schedule is tedious and you damn well know it, LET HER KNOW UPFRONT so she can book a plan B!! How freaking hard is that? I am sure guys would not like it if we started booking 2 appts at a time, and then cancelled on the lowest payer...same shit here.