i would like to book a train from cambridge on thursday .
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': '202'} {'service': 'train', 'act': 'inform', 'slot_name': 'depart', 'value': 'cambridge'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
there are 202 trains leaving from cambridge that day . where would you like to travel to ?