How to update requested slot in FormAction during validation

How can I access the requested list ?

def validate(self, dispatcher, tracker, domain):
    # type: (CollectingDispatcher, Tracker, Dict[Text, Any]) -> List[Dict]
    """"How can I updated the requested slots in here"""
  ##rqt_list= ["Name","food","placing_order","number_of_people","setting_pref","time"]
  ##I want to update of  if the customer want home delivery to  this list
##rqt=_list=["Name","food","place_order","time"]

i am facing the same issue … have you fixed it?

yes, A kind of. i have created different required slots with check.