Task-oriented dialogue about: train

Can you give me the address to the hospital in Cambridge?
The address is Hills Rd, Cambridge Postcode : CB20QQ
I am actually looking for a train on sunday from peterborough.
What is your destination?
Going to Cambridge.
At what time do you want to travel?
I would like to arrive by 11:45. I will need to buy 5 tickets once we find a train.
I have train TR7721 arriving at 7:38 would you like that one?
Yes, five tickets, please. What is the reference number?
Your reference number is CIGYXAW9 . Do you need anything else?