3.(★★★☆☆)读一读,演一演。
Assistant: Can I help you?
Mum: Yes, please. I want a pair of shoes for my daughter.
Assistant: What size?
Mum: Size four.
Assistant: How about this orange pair?
Mum: Are they nice, Amy?
Amy: Yes, Mum. I like them.
Mum: Are they all right?
Amy: Oh, no. They're too small.
Assistant: Please try on this pink pair. Size five.
Mum: Are they OK?
Amy: Yes. They're nice and pretty.
Mum: How much are they?
Assistant: They're twenty-nine yuan.
Mum: They're cheap. OK, we'll take them.

请你明确一下具体的题目要求，比如根据这段对话进行判断对错、回答问题、填空等，以便我为你进行准确解答。