i need to find a particular train that will arrive at 16:30 and will leave on saturday . i would appreciate it if you could help me .
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': '229'} {'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
there are 229 trains that meet your criteria . what are your departure and arrival stations ?