@classmethod
def topic_name(cls):
    """
        Topic name of this dialog service

        Returns
        -------
        topic_name : str
            Topic name of this dialog service
        """
    cls_name = cls.__name__.lower()
    if cls_name.endswith('dialogservice'):
        cls_name = cls_name[:-13]
    elif cls_name.endswith('dialog'):
        cls_name = cls_name[:-6]
    return cls_name
