can you help me find a train leaving on tuesday departing from cambridge ? i would like to go to kings lynn , please .
and where would you like to go ?
{'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'arrive', 'value': '?'}
at what time will you be traveling ?