i need an information on a train leaving cambridge on wednesday , please .
{'service': 'general', 'act': 'greet', 'slot_name': 'none', 'value': 'none'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
i would be happy to help find a train for you . can you tell me what your destination is ?