A: I'd like to have my hair cut.

我想理个发。

B: How do you want it?

你想剪什么发型?

A: Just a trim, and cut the sides fairly short, but not so much at the back.

修剪一下就行了。两边简短些，但后面不要剪得太多。

B: Nothing off the top?

顶上不要剪吗?

A: Well, a little off the top.

嗯，稍微剪一点。

A: How would you like your hair?

您喜欢理什么样的发型?

B: A little more off the back. Please don't cut it too short.

后面再剪一些。请不要剪太短，

A: How about the sideburns? Should I use a razor for them?

鬓角怎么弄? 要不要我用剃刀刮一下?

B: No, thank you!

不用了，谢谢。