Rasa not asking for extra slots

Well the way to set slots from buttons would be something like this:

utter_ask_SLOT_NAME:
  - text: "Please choose one."
    buttons:
      - title: "AL"
        payload: '/inform{"PERMANENTADDRESSSTATE": "Alaska"}'
      - title: "AZ"
        payload: '/inform{"PERMANENTADDRESSSTATE": "Arizona"}'
      ...

And if you wanted to set buttons within a custom action or validation action check out the solution here: Buttons without text