A: what can I do for you, sir?
B: I'd like to buy a pair of shoes.
A: What about this pair?
B: Oh, I don't like the colour.
A: What about the white pair?
B: OK. Can I try them on?
A: Sure. What size do you want?
B:I'm Size 43.
A: Here you are.
B: OK. I'll take them. How much are they?
A: 300yuan.
B:Here's themoney.
A: Thank you.