为下列句子排序,使之组成一段完整的对话。
A. OK. Can I try them on?
B. Yes. I'm looking for a whiteT-shirt.
C. Can I help you, sir?
D. You're taller than me. I thinksize XL fits (适合) you well.
E. Size L.
F. Of course. Here you are.
G. What size do you want,please?
C→→→→→ → F