i am looking for a train that leaves cambridge on wednesday please . i am travelling to london liverpool street and i'll be departing after 17:00 . can you please tell me the arrival time on that train ? i am also interested in a particular attraction .
where are you traveling to , and at what time will you be traveling ? tr4757 leaves at 17:59 . can i book seats for you ? tr4757 arrives by 19:27 . was there any other information you needed ?
{'service': 'attraction', 'act': 'request', 'slot_name': 'name', 'value': '?'}
what is the name of the attraction ?