Problem in coding a Welcome Message along with options in RASA

问题

I read this answer on How to code a Welcome Message in RASA, accordingly, I did write a custom action but it is not displaying the message as soon as the session starts, instead, it replies after the user has sent a message. Below is my code for printing just the welcome message. I had put this in my "actions.py" file. Please help me to fix this problem.

The image below is an example of How I want my bot to start, It would start up with a general message and then it would give options which the user would be choosing. This is what I am trying to achieve ultimately.

from typing import Text, List, Dict, Any

from rasa_sdk import Action, Tracker
from rasa_sdk.events import SlotSet, SessionStarted, ActionExecuted, EventType
from rasa_sdk.executor import CollectingDispatcher


class ActionSessionStart(Action):
    def name(self) -> Text:
        return "action_session_start"

    @staticmethod
    def fetch_slots(dispatcher: CollectingDispatcher, tracker: Tracker) -> List[EventType]:
        """Collect slots that contain the user's name and phone number."""

        slots = []
        return slots        


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

        # the session should begin with a `session_started` event
        dispatcher.utter_message("Hi, I am Aayush Bot !!!")
        events = [SessionStarted()]

        # any slots that should be carried over should come after the
        # `session_started` event
        events.extend(self.fetch_slots(dispatcher, tracker))

        # an `action_listen` should be added at the end as a user message follows
        events.append(ActionExecuted("action_listen"))

        return events

来源：https://stackoverflow.com/questions/61176574/problem-in-coding-a-welcome-message-along-with-options-in-rasa