i want to book a taxi . the destination is the museum of classical archaeology .
okay . where is the destination ?
{'service': 'taxi', 'act': 'request', 'slot_name': 'leave', 'value': '?'} {'service': 'taxi', 'act': 'request', 'slot_name': 'arrive', 'value': '?'}
when would you like to leave or arrive by ?