def assistant_greeting(cls, **kwargs):
        """
        Assistant greeting based on day hour.
        """
        now = datetime.now()
        day_time = int(now.strftime('%H'))

        if day_time < 12:
            cls.response('Good morning sir')
        elif 12 <= day_time < 18:
            cls.response('Good afternoon sir')
        else:
            cls.response('Good evening sir')

        Assistant greeting based on day hour.
        
src/jarvis/jarvis/skills/collection/activation.py