can you help me find a train departing from cambridge going to stevenage ? i would like to leave after 16:15 on tuesday . there is none that leaves earlier ? how much will that 1 cost me ?
what day would you like to leave ? i have a train that laeves at 17:21 . will that do ?
{'service': 'train', 'act': 'inform', 'slot_name': 'ticket', 'value': '12.80 pounds'} {'service': 'train', 'act': 'nooffer', 'slot_name': 'leave', 'value': 'earlier '}
there is no earlier train . the price is 12.80 pounds .