Here is a dialogue at a train station.
Sales Assistant: Hello, can I help?
Customer: Yes, I’d like to buy a ticket to London please.
Sales Assistant: OK, no problem. Is that a single or a return ticket?
Customer: A return please.
Sales Assistant: Do you have a student discount card?
Customer: Yes I do. Here it is.
Sales Assistant: OK that’s fine. That’s £32.50 please.
Customer: What time is the next train?
Sales Assistant: The next train leaves in 11 minutes from Platform 3.
Customer: OK. Perfect. Thank you.