Every story has three versions: yours, theirs, and the truth.
The OP has every right to tell the shop to fuck off and shove their 1:30pm booking up their arse.
What we don't know, is the chicks version; perhaps she had to get up early, travel 2hrs on public transport for a 9am booking, and the cunt doesn't show up.
Chick's constantly complain about flaky cunts who make bookings and cancel at the last minute or simply don't show up - ergo missed opportunities and loss of income.
At the end of the day we are all prostitutes and the organisations we work for are the brothels and massage parlours - we sell our bodies, hands, our intellect, skills, abilities, and talents to the highest bidder or for a fistful of dollars.
The aim of any organisation, institution or industry is to milk and make as many dollars as possible - it's that simple! This shit about 'work-life' balance and wellness is fucked up and a load of twisted horse shit.
Our modus operandi should be 'life-work' balance ie we balance work, meetings with German chancellors etc around our lives (not the other way round)
In some ways the sex industry exhibits more morals, ethics and values than governments, religions, private organisations, and public institutions.