Task-oriented dialogue about: train

I need a train into cambridge leaving after 20:30, please.
I have 259 trains travelling to Cambridge, could you be more specific on where you're departing from and what day/time?
I'm leaving London Liverpool Street on Sunday after 20:30.
There are 2 trains one leaves at 21:39 and one at 23:39
There are none closer to a 20:30 departure?
The only other train for that route leaves at 21:39 and arrives in Cambridge by 23:07. That is train TR4890. Would that suit you better?
That works. What is the price on that? And how long is the ride?
Price is 13.28 pounds and the ride is 88 minutes. Shall I get you some tickets?
No, I'm not ready to book yet. Thanks for your help. I am all set.
You're very welcome. Can I help you with anything else?
That is all. Thank you.
You have a great day and thank you for using our services.