问在Rasa NLU中重置特定插槽并再次询问问题

EN

from typing import Any, Text, Dict, List, Union

from rasa_sdk import Action, Tracker
from rasa_sdk.events import SlotSet, UserUtteranceReverted, EventType, AllSlotsReset
from rasa_sdk.executor import CollectingDispatcher
from word2number import w2n
from .functions import util

class ValidateRestaurantForm(Action):
    def name(self) -> Text:
        return "user_details_form"

    def run(self, dispatcher: CollectingDispatcher, tracker: Tracker, domain: Dict) -> List[EventType]:

        required_slots = ["number_table", "table_type", "reserve_time"]

        for slot_name in required_slots:
            if tracker.slots.get(slot_name) is None:    
                # The slot is not filled yet. Request the user to fill this slot next.
                return [SlotSet("requested_slot", slot_name)]

        # All slots are filled.
        return [SlotSet("requested_slot", None)]

class ActionSubmit(Action):
    def name(self) -> Text:
        return "action_submit"

    def run(
        self,
        dispatcher,
        tracker: Tracker,
        domain: "DomainDict",
    ) -> List[Dict[Text, Any]]:

        number_table = tracker.get_slot("number_table")
        number_table = w2n.word_to_num(number_table)
        table_type = tracker.get_slot("table_type")
        reserve_time = tracker.get_slot("reserve_time")

        flag, reserve_time_modified = util(reserve_time)
                
        if flag == False:
            dispatcher.utter_message(response="utter_deny_reserve_time")
            dispatcher.utter_message(response="utter_ask_reserve_time")
            return [SlotSet("reserve_time", None)] <-------Resetting the slot and ask 
                                                           reservation time again
        
        else:
            dispatcher.utter_message(response="utter_submit",
                                    number_table=number_table,
                                    table_type=tracker.get_slot("table_type"),
                                    reserve_time=reserve_time_modified)
        return [AllSlotsReset()]