Goal: Task 04317: You are looking for an expensive restaurant and it should serve vegetarian food. If there is no such venue how about british type of food. You want to know the phone number.

user: I would like an expensive restaurant that serves vegetarian food

system: There are no expensive vegetarian restaurants. Would you prefer a different cuisine or price range? 

user: A restaurant that serves british food will be fine. 

system: Graffiti is an expensive restaurant that serves British food, Would you like their address or phone number?

user: Could you tell me the phone number of Graffiti?

system: The phone number is 01223 277977. 

user: Thank you goodbye.

system: You're welcome. Goodbye.