can you find me a train from cambridge to leicester ?
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': 'several'} {'service': 'train', 'act': 'request', 'slot_name': 'arrive', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
there are several what day and time do you want to leave or arrive ?