i need a train on friday .
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': '404 '} {'service': 'train', 'act': 'inform', 'slot_name': 'day', 'value': 'friday'} {'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
there are 404 trains traveling on friday . where will you be departing from and where is your destination ?