I need to book a train from Leicester to Cambridge.  Can you help me with this?
There are 133 trains making that trip, do you have a day and time you would like to travel?
I would like to leave Sunday after 15:30.  Are there still any available>
TR1784 departs Leicester at 16:09, would that work for you? 
Yes. Please make a booking for 1 and be sure to give me a reference number.
You are all set for train TR7472. It will cost 30.24 GBP, payable at the station.  The reference number is CUPCJMGO.  Can I help you further?
Great. That is all I need. Thank you for your help.
You're welcome, enjoy your trip. 
Thank you so much!
You're very welcome. Thank you so much for using our service.