i would like a train from cambridge to broxbourne , please . yes . i would like to leave on sunday after 20:30 .
there are 133 trains making that trip , do you have a day and time you would like to go ?
{'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '21:01'} {'service': 'train', 'act': 'inform', 'slot_name': 'id', 'value': 'tr7208'} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
tr7208 leaves at 21:01 . would you like me to book it ?