i would like a train leaving from london liverpool street on wednesday , please .
{'service': 'train', 'act': 'request', 'slot_name': 'arrive', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
of course . what s your destination ? also when do you wish to leave and arrive by ?