It sounds like your therapist is basically okay with it and you do pay even if you don't show.

Mine would have called me on it though, paying or not. I never cancelled unless it was just unavoidable, but my husband had a habit of forgetting when his appointments were. He truly was forgetting them; his memory is truly awful. But our therapist expected consistency from us as he was also consistent. He was finally able to open up a permanent spot for my husband's appointments which helped immensely. So basically, he would have talked about it as a problem to be figured out and helped us come up with a solution.