I'd like to have my hair cut.
A: I'd like to have my hair cut.
B: How do you want it?
A: Just a trim, and cut the sides fairly short, but not so much at the back.
B: Nothing off the top?
A: Well, a little off the top.
Please don't cut it too short.
A: How would you like your hair?
B: A little more off the back. Please don't cut it too short.
A: How about the sideburns? Should I use a razor for them?
B: No, thank you!