I need to book a train leaving Thursday from Cambridge.  Can you help me with that?
Yes. What time will you be departing?
I will be leaving Saturday morning at 08:45
Is it Thursday or Saturday? And where is your destination?
Sorry for the confusion I need to get to peterborough Thursday night.
Okay, and what departure or arrival time did you need for Thursday?
I need to leave after 20:15
The first train after 20:15 is the TR2178, leaving at 20:34.
That sounds perfect.  Can you tell me the travel time, please?
The travel time is 50 minutes. May I book that for you?
Yes, I'd really appreciate that.
I was able to book a train for 1 on Thursday from Cambridge to Peterborough leaving at 20:34. Your reference number is 9IP722K1
Perfect, thank you for your help! 
Can I help you with anything further?
Nope, that's all. Thanks!
Thank you for using our service. Goodbye.