用英语编一段对话,急用,

A:Hi,Mary!This is John speaking!B:Hi!What's the matter,John?
A:Where is the supermarket?B:It's near the hospital.
A:OK!Thank you!B:You are welcome!What are you going to do on the supermarket?A:I 'm going to go shopping there.B:Oh!Byebye!
A:Byebye!