the Gourmet Burger Kitchen has exactly what you are looking for. It is located at Regent Street City Centre.
I want to find an expensive restaurant that has North American food. Great! Can you tell me the area of town that's located in, and give me their phone number, please?
{"__type": "Inform", "entity": {"__type": "Restaurant", "address": "Regent Street City Centre", "name": "the Gourmet Burger Kitchen"}}
{"__type": "Inform", "entity": {"__type": "Restaurant", "area": "center of town", "phone": "01223312598"}}
It is in the center of town. Phone number is 01223312598.