Task-oriented dialogue about: train

Hi there, I'm looking for a train going to cambridge.
I need to narrow down the search for you. Where are you heading?
As I said, I am heading to Cambridge.
I'm sorry, to help narrow down the results please reply with where you will be departing from and your requested arrival/departure time.
I need to arrive by 14:00
There is a train depart at 13:11 and arrive by 13:58. Would that work for you?
Yes, what is the ID?
Please confirm where you are coming from. Are you leaving from London--King's Cross Station? Or from somewhere else?
Oh, I'll be departing from bishops stortford, yes, thanks.
TR0516 arrives at 12:07, would you like to reserve seats?
Yes please. I would like to travel on Tuesday
I'm sorry for the mix-up, train TR0516 is not available on Tuesday. I do have TR4173 available but it arrives in Cambridge at 12:07. Will this work?
Yes, please book for 2 people./
You are booked. You'll pay 20.2 pounds at the station. Your reference number is ES8ZDMR2 . May I help with anything further?
No, thank you. That's all. Thanks!
thanks a lot
Have a great day.
You too! Please let us know if there's anything else we can help you with.