Hi! I need a train to London Liverpool Street. I need an early one, arriving there by 8:30.
I have 14 trains that will arrive before that time, is there a particular day you'd like?
I would like to leave on Wednesday.
I have no trains leaving at that time on Wednesday. Could you pick a different time or date?
You have no trains departing Cambridge to london liverpool street on Wednesday that will arrive by 8:30?
Oh wait I have found you one that departs at 5:59 and arrives in London at 7:27. would that do? Everything else is later.
Yes that is fine. How long is the journey and how much is the ticket by the way?
It will be 88 minutes and the price is 16.60 pounds. Shall I book a ticket?
Yes book me a ticket please.
No problem, your ticket is booked.  The reference number is 69URTU8A.
Thank you, that's all I needed today.
Great! Have a wonderful time! Goodbye!