What is your cancellation policy?
If your client cancels with more than 48 hours notice of your sessions then they will be granted a full refund and you will not be paid.
If your client cancels the session within 24-48 hours of the scheduled time then you will receive 50% payment.
If your client cancels the session within 24 hours of the scheduled time or if you they do not attend the session you will be paid in full.