i need a train to cambridge , departing from the peterborough station .
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': '266'} {'service': 'train', 'act': 'inform', 'slot_name': 'depart', 'value': 'peterborough'} {'service': 'train', 'act': 'inform', 'slot_name': 'dest', 'value': 'cambridge'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
there are a total of 266 trains traveling from peterborough to cambridge . what day would you like to leave ?