介绍:
A: Can I help you?
B: Yes. How much is that shirt?
A: It's $25.99 originally, but it's on sale this week, so the price
will only be $19.99.
B: Nice. Can I try it on?
A: Sure. What is your size?
B: I don't know.
A: Ok, try a size 12. Let me know if you need to exchange it for
another size.
B: Thank you.
B: Do you have it in a smaller size?
A: Yes, I do. Here you are.
B: Thank you. I will take this one.
