Task-oriented dialogue about: train

I need to get a train from cambridge to Norwich.
I have a train leaving at 12:36 and arriving at 13:55. Is that ok?
Actually no, I need a train leaving on Monday after 20:30.
I have a train which leaves at 20:36. Would that work for you?
book for 4. get me the reference number please
Booking was successful, the total fee is 70.4 GBP payable at the station. Reference number is : RI594OCX .
Awesome. You've been a great help. Thank you.
You're very welcome. Goodbye.