i need to go to broxbourne on monday train , monday , to broxbourne from cambridge . i need to leave cambridge after 21:15
okay , not problem . would you like to travel by train or taxi ? where are you departing from ? is there a time you need to leave or arrive by ?
{'service': 'train', 'act': 'select', 'slot_name': 'arrive', 'value': '23:01'} {'service': 'train', 'act': 'select', 'slot_name': 'arrive', 'value': '24:01'} {'service': 'train', 'act': 'select', 'slot_name': 'leave', 'value': '22:01'} {'service': 'train', 'act': 'select', 'slot_name': 'leave', 'value': '23:01'} {'service': 'train', 'act': 'select', 'slot_name': 'day', 'value': 'monday'}
there are 2 trains you can take on monday , either the 22:01 arrive 23:01 or the 23:01 arrive 24:01 . which train do you prefer ?