i will be visiting cambridge and i need to arrive by 9:15 on saturday . i'll be departing from peterborough .
okay , i can help you with that . where will you be departing from ?
{'service': 'train', 'act': 'inform', 'slot_name': 'arrive', 'value': '9:09'} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '8:19'} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
there is a train leaving at 8:19 and will arrive at 9:09 . would you like me to book that for you ?