I need a train leaving on Saturday after 5:30 pm
What is your departure site and destination?
I am departing from stevenage and going to cambridge. 
Just to clarify, you want to leave after 05:30 (am), or 17:30 (5:30 pm)? 
After 17:30 please
There is a train that leaves at 17:54.
The train should go to Cambridge and should depart from Stevens. Once you find the train you want to make a booking for 8 people.
There are 4 trains that meet your specifications. They run every two hours. The first one leaves at 17:54 and the last at 23:54. What would you prefer?
I think I would be interested in the 17:54 and I need to book it for 8 people.
Okay TR2442 is booked for 8 people at 17:54 on saturday. It will cost 81.92 GBP in total, and your reference number is CCTYHUU8.
I'm also looking for a restaurant that serves north american food, in the expensive range.
gourmet burger kitchen is perfect for you. It is in the center and is in expensive  price range. Could you like a reservation?
Yes. That would be great. Make it for Saturday for 8 people at 20:30. 
Table for 8 at Gourmet Burger Kitchen, arriving at 20:30. They can hold your table for up to 15 minutes, only. Your Reference number is : ACOVVEZM.
Thank you, that is all I needed. 
Have a good visit.