A：How can I help you today?我能为您做点什么?
B：I am returning something that I bought yesterday.我来退还昨天在这儿买的东西。
A：What would you like to return?你想退什么?
B：I'm returning a cellphone.我要退手机。
A：Was there somethinig wrong with it?出现什么问题了吗?
B：It's defective.这部手机有缺陷。
A：What isn't working on it?手机哪里运转不正常了?
B：It keeps turning off on it's own.它总自己自动开机和关机。
A：Alright, do you have the receipt?好的，你带收据了吗?
B：I have it right here.我带来了。
A：I'm going to take care of this and refund your money.我会处理这件事，并且退还你的钱。
B：Thanks for your help.谢谢你的帮助。