Task-oriented dialogue about: train

I need a train from Cambridge that can arrive by 16:15.
Certainly. Where is your destination?
I want to go to Broxbourne, please.
What day do you want to travel?
The train needs to leave by Saturday and I need three tickets. I would also like the reference number once you book it please?
I booked it you reference number is DUW21NUT
Thank you, that's all I needed.
You are welcome. Your total for the three tickets is 42.96 pounds. You can pay at the station.