I charge all my students for 2 lessons so that they pay for the next lesson in advance.
I accept a cancellation 48 hours in advance. I will reschedule the lesson and the advance payment will still hold for the rescheduled lesson.
A cancellation made 24 hours or less prior to the lesson will incur payment for that lesson and I will hold the advanced payment. The student will have to reschedule and pay for their second lesson.
These stipulations are made from experience. It must be appreciated that I am a busy working actor and I attend a lot of castings and auditions. When I organise a teaching session, I do not attend castings at that particular time as I am committed to the student first-and-foremost. If the student cancels late, I am then losing out on castings and work that I could have attended. Therefore, respect on both sides of the agreement is appreciated.