I want to find a place to eat that serves indian food in the centre of town.
There are 9 restaurants that fit that description. Are you looking for a cheap or expensive restaurant?
Price range doesn't matter. Which restaurant out of the 9 do you recommend?
I'd recoment the Mahal of Cambridge.  It's inexpensive, and conveniently located.  Would you like me to book you?
That sounds fine. Can you book for 4 people at 19:30 on sunday? 
Booking was unsuccessful.   Would you like me to look at another location?
Yes. Can you find me something that is available in the same area and price range?
How about the ghandi?
Ok lets try there.
Your all set. Reference number is HKBDRN69. Anything else?
No thank you.
Okay. Thanks so much for calling. Enjoy your evening!