用英语写一段对话,内容如下：假如你和你的母亲一起去商店买东西,你也恰巧要买一件外衣,请你根据这一情景编一段不少于5个句子

You:Mom,I'd like to buy a new sweater.
Mom:What do you think of this blue one?It looks good on you.
You:It is pretty,but it doesn't match my scarf as well as the yellow one.
Mom:You are right.How much does it cost?
Saleman:It costs you only 99 yuan at a discount right now.