i am looking for a train from cambridge to london kings cross . i need to leave after 17:45 on tuesday
i see several options , all leaving on friday . is there a time you prefer to leave at ?
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': '3'} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '19:00'} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': ' 21:00'} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': ' and 23:00 '} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
there are 3 trains that match your request . they leave at 19:00 , 21:00 , and 23:00 respectively . would you like to buy a ticket for 1 of these ?