i need to go to broxbourne on monday
{'service': 'taxi', 'act': 'request', 'slot_name': 'depart', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'}
okay , not problem . would you like to travel by train or taxi ? where are you departing from ?