hello . i would like a train to ely please . i will be departing from cambridge on wednesday . i would like to leave after 21:00 .
i can do that . when and where will you be catching the train ?
{'service': 'train', 'act': 'request', 'slot_name': 'arrive', 'value': '?'}
thanks for that information . is there a time you would like to arrive by ?