i need a train on monday leaving birmingham new street ? birgmingham new street from cambridge anytime after 21:00 .
where are you headed ? what time monday would you like to depart ?
{'service': 'train', 'act': 'inform', 'slot_name': 'id', 'value': 'tr8406 '} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '21:40'} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
tr8406 will depart at 21:40 . is that okay ?