i need a train that leaves on monday going to cambridge .
{'service': 'general', 'act': 'greet', 'slot_name': 'none', 'value': 'none'} {'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'}
wonderful , i can help you . could you tell me where you are departing from so we can begin to book your ticket ?