I would like a restaurant in the centre that is in the expensive price range. 
There are 33 restaurants in the centre that are in the expensive price range. What type of food would you like?
I am interested in Indian food please.
There are six restaurants that match that description. Can recommend one of them for you?
Yes please do.
The Curry Garden serves expensive Indian food in the centre of town.
Great can I get a reservation there for 8 people at 12:30 on sunday?
Sorry, there is no table available then. Would you like to try another time slot?
I think I'd rather try a different restaurant at my preferred time, actually.  You mentioned there are several others?
Yes, there's the Goden Curry, Saffron Brasserie, Panahar, and Curry King.
Great! Can I have the Goden Curry? 
Sure, when would you like to make a reservation?
12:30 on Sunday. There will be 8 of us.
I apologize. I have checked all of the restaurants in the area and none of them can accommodate 8 guests at 12:30 on Sunday. Would a different day or time suffice?
I guess I could try 11:30.
Reservation booked with The Curry Garden for Sunday at 11:30am for 8 people.  Your reservation will be held for 15 minutes. Reference number is 6GRFMVDJ. 
Thank you so much.
You're welcome.  Anything else I can help with today?
No, I am all set.  Bye.
Thank you. Have a nice day, goodbye.