导购口语:

If you have the receipt, I can relace it for you.
如果您有发票，我可以我给您换。
You can exchange it, Provided that you haven't taken off the tag.
只要你没有把吊牌拿掉便可换货。
I'm sorry; I can't exchange your shirt without the receipt.
很抱歉。没有发牌，我不能给您换这件衬衫。