If you cancel a lesson without giving at least 48 hours notice, or don't show up for your scheduled time, you will have to pay the full amount for the lesson.
The start time of your lesson is your allocation. If you are late, the lesson cannot overrun to make up the full hour.
If you are unable to attend your allotted time slot for more than 2 consecutive lessons, or you frequently cancel lessons, I may have to allocate your slot to someone else.