i need to book a train for 9:30 that departs from cambridge .
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': 'lots '} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
there are lots of trains that fit those criteria . where would you like to go ?