What was the woman going to buy?

M: Good morning! What can I do for you, Madam?
W: Good morning ! I’ m looking for a coat.
M: What color would you like?
W: Could you show me some? I’d like a middle-sized red coat.
M: Sorry. We haven’ t anything in your size.
W: Do you have a smaller size?
M: I’ m sorry. The small size coats have just been sold out. What about the blue one? It looks nice and maybe fits you.
W: Well, may I try it on?
M: Yes, please.
W: It seems nice on me. How much is it?
M: 168 yuan.
W: OK. Here is 170 yuan, please.
M: Your change, please. Thanks.
W: You may keep the change. Good-bye.
M: Thank you ! Good-bye !