hello . i am looking to take a train into cambridge at 7:15 pm .
{'service': 'general', 'act': 'greet', 'slot_name': 'none', 'value': 'none'} {'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'}
no problem . where are you departing from ?