i need a train to norwich . i need to get there right before 20:45 . i will be leaving on sunday .
and what day are you traveling ?
{'service': 'train', 'act': 'inform', 'slot_name': 'arrive', 'value': '20:45'} {'service': 'train', 'act': 'inform', 'slot_name': 'arrive', 'value': '19:55'} {'service': 'train', 'act': 'inform', 'slot_name': 'id', 'value': 'tr9083'} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
the train that arrives closest to 20:45 is tr9083 arriving at 19:55 . shall i book it ?