i am looking for a train that leaves from cambridge after 15:45 i would like to travel to stansted airport .
there are many trains , please tell me a destination to help narrow it down .
{'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '16:40'} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
the earliest train after 15:45 leaves at 16:40 . would you like me to book you a seat ?