Hello, I'm looking for a train that departs from Cambridge and leaves after 21:45.
There are quite a few options open to you, is there a particular destination you have in mind?
I would like to go to broxbourne
There is no train leaving at 21:45, but there is train departing at 21:59  do you want that train? 
Does the train leave on Friday?
I apologize. That train does not leave on Friday. For Friday, I have two trains. One departs at 22:01 and the other at 23:01. Does one of these work?
Yes, the 22:01. Book that for 2 people. I need the reference number too.
Your reservation is confirmed forTR9312 Leaving Cambridge at 22:01, arriving in Broxbourne at 23:01. Your reference number is 59C0U68K. Total fee is 35.79, which is payable at the station. 
Great, thanks. Can you also provide me with some info on a restaurant called Travellers Rest?
Absolutely!  That is a British restaurant on the west side of town.  It is considered to be in the expensive price range. 
Could you please make a reservation for us at 11:15 on the same day?
I'm unable to make that reservation for that time. Would you like to try a different time?
How about 10:15?
Your table is reserved for 10:15. Your table will be held for 15 minutes. Your reference number is : 3H26GVJV. Is there anything else I can help you with?
No, that is all that I needed.  Thank you for your help!
It was my pleasure to help you today. Enjoy Cambridge and text us back anytime!