Task-oriented dialogue about: train

I would like to book a train for Tuesday at 18:45 departing at bishops stortford and arrive at Cambridge.
What time would you like to arrive by?
I just need to leave after 18:45.
The TR9286 train goes from bishops stortford to cambridge on Tuesday at 19:29, Shall I book that for one person?
Can you please book it for 4 people?
Hi..A reservation for 4 people has been confirmed. The reference number is 30MCMOEX and the price is 40.4GBP payable at the station. Anything else I can do?
No, thank you for your help.
you are welcome! Have a good day!