<span>hinge joint
would be the answer</span>
You would want to talk to her in the back and use a moderate tone and show her the schedule showing that she was booked for a appointment another day and time. You then tell her that you are sorry for any inconvenience and that you will be expecting her on the right day of her appointment.
Wear gloves and hairnets. Regularly disinfect any surfaces that you’ll use
