I need a train ticket to Cambridge, sometime after 15:45 if you can find one.
There are over 600 trains to Cambridge that leave after 15:45. Can you tell me the day you're traveling and your departure station?
departure is sunday from ely.
I found four trains, one leaves at 17:35, 19:35, 21:35 or 23:35. Which would you like to book?
I'll book the one that leaves at 17:35. What time does the train arrive?
It arrives at 17:52. Shall I go ahead and book it for you?
No. I'm looking for a a gastropub restaurant in the centre.
There are 3 gastropubs in the centre.  2 are expensive the other is moderate. Do you have a preference in the price range? 
Yes, I need one in the cheap price range please.
There are no gastropubs in the centre part of town in the cheap price range. Would you like something else?
Ok, how about one serving italian food?
Pizza hut city centre, ask, and zizzi cambridge all are italian restaurants in the centre part of town in the cheap price range. Would you like me to book one?
Yes. Can you please book Zizzi Cambridge for 3 people at 21:00 on the same day, Sunday.
I have reserved a table for three at 21:00. The reference number is OUN5OI0K.
Finally. Thank you. Pizza Hut. I ate there when I was a kid. It's a long story. I wonder if this one has a jukebox. 
That's an interesting question, but unfortunately I haven't that information. Is there anything else I can help you with, though?
No. Everything is perfect. Thank you for your time.
Thank you for using this system!