i need to book train tickets . i need a train that is headed to london kings cross and i need to arrive by 20:30 . i will be leaving saturday .
sure , where are you headed ? i can help with that . what day will you be travelling ?
{'service': 'train', 'act': 'inform', 'slot_name': 'dest', 'value': ' london kings cross'} {'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': '8'} {'service': 'train', 'act': 'request', 'slot_name': 'leave', 'value': '?'}
we have 8 trains to london kings cross that day . is there any particular time you would like to leave by ?