i need a train that will be leaving from cambridge by 16:30 , can you help me with this please ?
{'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
where would you like to go and on what day ?