i want a train going to cambridge . i am departing from ely on wednesday .
where are you leaving from and what day ?
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': 'quite a few'} {'service': 'train', 'act': 'request', 'slot_name': 'arrive', 'value': '?'}
what time would you need to arrive ? i have quite a few options to choose from .