If by hair straightening service she meant
a Keratine straighting, or laser phototonic straightening which take about 2 hours to do and the straightening last 3 months.
Then in many normal hairdressers the going price is 500-600 pesos
I did it one month a go but paid substantially less as I bought a coupon at one of the daily coupon sites.
US1000 seems a bit/lot much, he is either very very good, uses premium products and is very recommended amongst Four seasons concierge (who might get a % of that), He works for the Four Seasons and thus it is the Hotel that sets rates....
or very very lucky and able to reach the right target for his services...