Task-oriented dialogue about: train

I need to leave peterborough and arrive by 20:45. Can you book a train for me?
What time would you like to depart?
I will depart any time so long as the train arrives by 20:45.
OK, and what day do you need to travel?
Oh, I need to leave this Saturday. Just to clarify I want to leave Peterborough going to Cambridge.
TR7143 will arrive in Cambridge Saturday by 20:38, it will depart peterborough at 19:48. Does this suit your needs?
Yes that is perfect. Can you book that and give me a reference number?
Yes I booked it and your reference number is 6793D7ED . Will there be anything else?
No, I think that's going to be all I needed. Thanks. Have a good day.
Thank you, Enjoy your day, goodbye.