i need a train on friday from the london liverpool street station . the train should leave after 17:15 and should go to cambridge . what is the arrival time ?
there are 10 trains leaving that station on friday . what time would you like to travel ? there are 4 trains that leave after 17:15 . the tr9886 leaves at 17:39 from london liverpool street . would you like me to book you a seat ?
{'service': 'train', 'act': 'inform', 'slot_name': 'arrive', 'value': '19:07'}
that train arrives at 19:07 .