What do you think is fair?

[JessicaJessy]

Well Jessica, as far as I am concerned, if I book an hour I pay for the hour. If I decide to leave a bit early, that's my decision, so I wouldn't look for a refund.
If I was you, I would consider maybe giving them a token refund of 10-15% as a gesture of goodwill, if you think he is genuine, but I think you are mad to give 50% back.

Well yes,i am mad,i know that!And i am mad thinking that some people should be more respectful about our time!