I am looking for a restaurant in the expensive price range. It should serve Sri Lankan food.
I'm sorry but I have nothing listed. Is there another type of food you might be interested in?
I was really hoping for Sri Lankan.
I'm afraid there aren't any Sri Lankan restaurants in town at all. Is there something else I can search for you? 
How about gastropub?
I found three located in the centre and one on the east. Which would you prefer? 
Are they all listed as expensive?
Yes, they are all expensive. backstreet bistro is in the centre area, and royal standard is in the east. Would you like me to make a reservation at either of these?
Could you please give me the phone number for the Royal Standard?
Sure, it's 01223247877.
Okay, thanks. That will do it for today.
You are most welcome. Thank you for calling Cambridge TownInfo Centre. Goodbye.