i am looking for an expensive place to eat in the centre .
{'service': 'restaurant', 'act': 'request', 'slot_name': 'food', 'value': '?'} {'service': 'restaurant', 'act': 'inform', 'slot_name': 'price', 'value': 'expensive'} {'service': 'restaurant', 'act': 'inform', 'slot_name': 'choice', 'value': 'a lot'} {'service': 'restaurant', 'act': 'inform', 'slot_name': 'area', 'value': 'centre'}
there are a lot of great , expensive restaurant in the centre . what type of food would you prefer ?