Initial default action in Rasa

Rasa Open Source
1

Is there a default action where the conversation is started for the first time

Because I want to use this default action as a super class to use it in a new custom action to add new field in the tracker to be saved in the conversations database.

My idea is this:

class MyNewCustomAction(<Default Initial Conversation Action>):

    def name(self) -> str:
        return 'my_new_custom_action'

    def run(self, ..., tracker: Tracker, ...) -> LIst[Dict[Text, Any]]:
        # here use the tracker variable to add new database attribute for each conversation created
        pass