are there any pricey russian restaurant -s in cambridge ?
{'service': 'restaurant', 'act': 'request', 'slot_name': 'food', 'value': '?'} {'service': 'restaurant', 'act': 'request', 'slot_name': 'price', 'value': '?'} {'service': 'restaurant', 'act': 'nooffer', 'slot_name': 'food', 'value': 'russian '} {'service': 'restaurant', 'act': 'nooffer', 'slot_name': 'price', 'value': 'expensive '}
my system is not pulling up any expensive russian restaurant -s . would you like to try another cuisine or price range ?