i am looking for a train to stevenage , please . i would like to leave on saturday and would like to arrive by 21:00 to cambridge .
there are 70 trains departing to stevenage . what day would you like to leave ?
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': 'many '} {'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'}
i have many options available . may i have the departure site please ?