Task-oriented dialogue about: train

I am looking for a train going from Cambridge to stansted airport.
I'd be happy to help with that. What day and time are you traveling?
The train needs to leave on Monday after 11:45.
Do you need to arrive by a certain time?
No, just the closest time after 11:45 for 5 tickets please.
TR8699 leaves at 12:40 on Monday. Would you like to book a ticket?
Yes please. Can I have the reference number for the booking?
I have booked your train for 5 and your reference number is A85FTGK4 . Can I help you with anything else today?
No, that will be all. Thanks for your help.
You are welcome! Have fun! Goodbye!