This is very frustrating , I just had it happen to me- she said she found a friend that could take the dog. After I cleaned my home, rearranged my schedule and cut a meeting short she calls me 30 minutes before the Meet and Greet to cancel and since she had already paid had the nerve to ask me for a full refund after I had held the space for her and turned other clients away. Very frustrating. The way I believe it should be is if they set up a Meet and Greet and cancel after that the least they can do is pay a fee for the Meet and Greet since they wasted my time or a cancellation fee. The reason people do this is because there are no consequences to wasting your time. They simply don't care.