It’s interesting, but it’s never going to be volitional.
It’s never going to be the one in the room to start a conversation, and if it does, you’d consider it invasive anyway. Alexa started joining in a lively discussion between you and your friends, for example, wouldn’t be welcome, it’d be very disturbing, and it would have been non-volitional, in any case, since it would have been “prompted” by the existing discussion