i am looking to book a train to cambridge . i need it to arrive by 16:00 . i also need it to department from cambridge . can you assist me ?
{'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
so you want a train to and from cambridge ? can you please clarify and also give a day ?