根据对话内容，写出适当的句子将对话补充完整。
(A: clerk B: Mary's mother)
A: Welcome to our shop! ____？
B: Yes, please. I want to buy sports shoes for my daughter.
A: ____
B. Red.
A: What about this pair?
B: It's a little big.
A: What about these ones?
B: They are OK. ____
A: 130yuan.
B: ____
A: ____
B: Thank you.
A: You are welcome.
