i just need a little help booking a train from cambridge . to bishops stortford i need to arrive by 12:45 on tuesday . i do not care what time i depart as long as i can arrive by 12:45 on tuesday .
where are you traveling to ? what time do you need to depart and on what day ?
{'service': 'train', 'act': 'request', 'slot_name': 'people', 'value': '?'}
alright perfect ! how many people will need tickets ?