i would like for you to find a train that leaves on wednesday after 16:45 .
{'service': 'general', 'act': 'greet', 'slot_name': 'none', 'value': 'none'} {'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
okay , let me look that up for you . do you have a destination or a departure site ?