would you be able to help me find a train for friday ? i need a train that departs cambridge to stevenage on friday leaving after 18:30 .
gladly . where are you headed ?
{'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '19:21'} {'service': 'train', 'act': 'inform', 'slot_name': 'id', 'value': 'tr8118'}
the first train running that route after 18:30 is the tr8118 , leaving at 19:21 .