A. What can I do for you? B. Can I help you? C. They are easy to become dirty. D. Do you like sports shoes? E. Do you have a blue pair in Size37? F. What kind of shoes do you want, sports shoes or slippers? G. How much are they?

A:   
B: Yes. I am looking for a pair of shoes for my daughter.
A:  
B: Sports ones.
A: How about this pair? They are the latest fashion and very comfortable.
B: Oh, I don’t like the white ones.   
A: What about the blue ones?
B: They look nice.   
A: Yes. You can let your daughter try them on when you get home. I hope they will fit her. If not, you can bring them back and I can exchange them for you.
B: OK.  
A: 30 dollars.
B: I’ll take them. Where can I check out?
A: This way, please.