Goal: Task 00627: You are looking for an expensive restaurant and it should serve vietnamese food. If there is no such venue how about north american type of food. You want to know the phone number and postcode of the venue.

user: I need an expensive restaurant

system: What kind of food are you interested in?

user: I would like Vietnamese food 

system: No restaurants matching your queries have been found. Would you like to search for another food type?

user: Is there any restaurants severing North American food.

system: Gourmet Burger Kitchen is an expensive restaurant that serves North American food.

user: Is that expensive? 

system: Yes, it is listed as expensive in my database. Would you like more information on it?

user: Yes, I would like to have the phone number and postcode please. 

system: phone number is 01223 312598, postcode is C.B 2, 1 A.B.