I'm looking for a train going to london liverpool street.
I'd love to help! where's your destination?
I would like to go to London Liverpool Street.
I'd love to help! Where are you departing from?
I am departing from cambridge.
How about TR5154 that leaves at 05:59?
help me  get price and train ID
The price is 16.60 pounds. Train ID is TR5154. Would you like to make a reservation for this train?
Not today, thank you. Does the train arrive by 09:15?
No, it arrives at 7:27.
Can you go ahead and book it and get me a price please?
Before booking, could you please confirm either the time you'd like to depart or arrive? 
I need to arrive at 09:15. 
How about TR5154 which leaves on Friday at 05:59 and arrives by 07:27. It is 16.60 pounds and total trip is 88 minutes. Would you like me to book that?
No I don't need to book. Thanks for the information.
You're welcome. Have a great time!