i need a train to cambridge . i am currently at birmingham new street . tuesday , i would like to arrive by 14:00 , please .
sure , when do you want to leave ?
{'service': 'train', 'act': 'inform', 'slot_name': 'arrive', 'value': '13:23'} {'service': 'train', 'act': 'inform', 'slot_name': 'day', 'value': 'tuesday'} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '10:40'} {'service': 'train', 'act': 'inform', 'slot_name': 'dest', 'value': 'cambridge'} {'service': 'train', 'act': 'inform', 'slot_name': 'id', 'value': 'tr4931'} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
train tr4931 leaves tuesday at 10:40 and arrives by 13:23 in cambridge . would you like to book this train ?