根据对话内容，在空白处填入恰当的句子，使对话完整、通顺。

A: I like that shirt.

B: The black one? I don't like it

A: ?

B: It's very nice and the color suits (适合) you.

A: ?

B: I don't know. I can't find the price tag (价签).

A: ?

B: OK, but where is the shop assistant (店员)?

A: Oh, look That shirt is like (像) the blue one.

B: ?

A: Yes, it does. It's only $20.

B:

A: Yes, I'll buy it.