I am looking for a train to Cambridge, the train should depart after 21:45?
Hi, train TR4210 leaves fiday at 22:11.  Would you like me to book it?
I need to leave on Saturday from London Kings Cross. Is there a train leaving after 21:45 that fits my needs?
I have train TR8830 that will be leaving London Kings Cross at 23:17 and arriving in Cambridge at 24:08. Would that work for you? 
Yes, how much would that cost total?
It is 18.88 pounds per ticket. How many tickets would you like to purchase?
Just one ticket please and thank you 
Your ticket has been reserved. Total fee is 18.88 GBP, payable at the station. Reference number ZM5K0A4Q. Can I help you with anything else today?
Can you book autumn house for 7 people, starting on saturday for 4 nights, please?
Thank you so much for reserving my train ticket. I have the information for Autumn House you requested. Would you like me to reserve it for you?
Yes. I need the reference number.
The booking was successful. Your reference number is DTKW11YU
That is all I needed today, thank you for your help. 
You're welcome. Have a great day!