I need to book a nice expensive restaurant in the centre please.
There are several nice expensive restaurants in the centre area.  Is there a particular food type that interests you most?
I don't have a preference. I need a table booked for six people at 13:45 on Thursday, though. 
I am sorry none of the listings have tables available for that time, is there another time that will work?
How about 12:45 instead?
Sure. Kymmoy, a good Asian Oriental restaurant has space. You are reserved and your reference number is L7HRCY1K. Can I help with anything else?
I am looking for a train that departs from Cambridge and leaves after 21:45.
I can help you with that. What is your destination?
It is stansted airport.
How about the 22:40 train? It gets in at 23:08. Does that work?
Yes I need the price also.
10.10 pounds, and it's TR3864
Thank you. That is all for now. 
Are you certain I can't help with anything else right now?
No, that is all I need, thank you. 
Thank you so much for using our service. Have a good day. Goodbye.