(John wants to go to the post office and send a letter. But he doesn't know the way)
John: Excuse me. Could you please tell me how to get to the post office?
Tom: Sorry, I don't know I'm new here. Please ask that girl.
John: Excuse me. Could you tell me the way to the post office?
Mary: Go along this street until you reach the second traffic lights. Then turn right. You can see a bookstore. The post office is next to it.
John: Can I take a bus to get there?
Mary: Yes, you can.
John: Which bus should I take?
Mary: You can take Bus No.6.
John: Thank you very much.