A：Hello, B. Where are you going?
B： I want to buy some books at Books Plaza.
A：That's too much trouble. You can buy them on the internet and they'll be cheaper.
B：Is it reliable to buy things online?
A： They'll deliver the books to your home for free and if there is any problem you can return them.
B： Really? Come and teach me how to buy books online.
C： Hello，A and B.What are you going to do?
B：We want to buy somethings on the internet.
C：Is it reliable to buy things online?
A：Yeah. It's really convenient to shop from home. It also saves time.
C：What about counterfeit goods?
A：Well, some places sell them. So you have to be careful where you shop.
C：Do you accept returns?
A：They accept returns up to seven days after purchase but they do not cover shipping and handling.
C:Oh,I know, E and F were shopping online ,I think they can help you.I have something to do ,byebye
A and B: Bye.