i would like a train going to kings lynn . i do not want to leave until after 17:30 . from cambridge .
the tr3112 will get you there by 05:58 . will that work ? okay , there are many options for you to leave after 17:30 to kings lynn . where are you departing from ?
{'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
what day will you travel ?