24 h cancellation notice is required.

If you are "on call" from work, please do not book  an appointment.  

Please come a few minutes earlier.

If you are running late, you still going to get  a service, but your appointment time will be shortened and the full price will be charged.

"Zero" tolerance to a clients cancelling on the short notice. 

It means - no cancellation fees,  just wouldn't  be able accept you as my client in future.