How to generate new story if rasa form validation not satisfied?

Rasa Open Source
1

Hai i want to generate a new story if user say ‘no’, any solution?

# validate product type
        if intent_name == 'intent_no':
            # Generate New Story
            dispatcher.utter_message(response='utter_offer_help_again')
            return {"requested_slot": None, "ENT_FRUIT": None, }
        else:
            # Continue Story
            if fruit in ['apple', 'mango', 'grapes']:
                return {"ENT_FRUIT": fruit }
            else:
                dispatcher.utter_message(response='utter_sorry')
                return {"ENT_FRUIT": None}