i am look for a train leaving cambridge . i want to travel to kings lynn on saturday .
i can help you with that . where is your destination ? what day do you want to travel ?
{'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'arrive', 'value': '?'}
do you have a timetable that you need to stick to ?