AutoVoice how to disable Responses

Hi everybody,
I'd like to know if there is the possibility to disable responses.
I've a some tasks that trigger an event and I don't require a response.

When I create an autovoice recognize event (with tasker), despite i left blank "Responses" field, after sending the speech command to google assistant, I always get the "default" autovoice response.

There is something I can do to avoid any kind of response?
Regards,
Pane