Hello
Hairdresser works alone in a salon. No receptionist.
During a 30min haircut she will stop to answer the salon phone 2-3 times. She clearly tries to keep the calls short and book in the client for their appt or whatever quickly.
I guess prices would go up if she had a receptionist but I compare it to say a beauty salon nearby - they just let the answering machine get the call if they're with a client.
YABU - this is a normal way to run a busy salon
YANBU - hairdresser should not take calls whilst with a client