i am looking for a train to cambridge . i would like to leave on friday .
what day will you be traveling ?
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': 'several'} {'service': 'train', 'act': 'request', 'slot_name': 'people', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'}
okay i have several . what time are you leaving , and how many tickets would you like ?