i am looking for a train ticket , do you book those ? i am leaving from cambridge and going to bishops stortford .
yes , where will you be leaving from and going to ?
{'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'arrive', 'value': '?'}
on what day will you be traveling ? do you prefer a specific time as well ?