Hello.  I need a train ticket on a train going from Cambridge to Ely.
What day would you like to travel, and at what time do you want to leave?
I'd like to travel on Saturday, but I don't want to leave until after 19:30.
TR7349 will depart cambridge at 19:50 on Saturday, arriving in Ely at 20:07. Will that work?
Yes please book a seat for me.  And can you tell me if there are any african restaurants in ely near the train station?
Your seat has been booked for the TR7349, reference number is ER5D744W. I can look up African restaurants in Cambridge but not Ely.
What is the price and travel time for that train?
The travel time is 17 minutes and it will cost you 3.52 pounds. 
Great that's all the info I needed today thank you.
I'm happy to be of service. Enjoy your time in Cambridge!