hi , i am looking to book a ticket for a train departing on sunday from cambridge please ? i want to arrive at london kings cross .
what is your destination ?
{'service': 'train', 'act': 'inform', 'slot_name': 'time', 'value': '51 minute'} {'service': 'train', 'act': 'inform', 'slot_name': 'ticket', 'value': '18.88 pounds'} {'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'}
what time would you like to leave by ? it is a 51 minute trip for 18.88 pounds .