根据对话内容，用恰当的单词、短语或句子补全对话。

A: ?

B: Yes, please. I want a skirt for my aunt's birthday party.

A:  do you want?

B: I want a red one.

A: Come here, please. How about this one?

B: I love it. What is it made of?

A: It's made of cotton.

B: ?

A: It's seventy-nine yuan.

B: OK. I'll  it.

A: Here you are.

B: Thank you.

A: .