Task-oriented dialogue about: train

I need a train to leave from London's Cross.
What day would you like the train for?
I'd like it to be for Saturday.
I have a train that leaves London Kings Cross at 05:00 and arrives by 05:51 at a price of 18.88 pounds. Is that OK?
Yes, it is perfect. Thank you
I'm sorry I had that completely mixed up. There is a train leaving London Kings Cross at 5:17 and arriving in Cambridge at 6:08. Does that work?
Yes please book that and give me the reference number of the booking.
Yes I was able to book that and your reference number is XYVAABBJ . Cost of the ticket will be 18.88 pounds. Is there anything else?
No that will be all thank you.
Glad to help. Have a nice day. Good bye.