Ah, right, I suppose it's contextual. You would also have to read the comment that it's responding to. To summarize: it might not have to be AI.

However, 911 is a bit too dynamic for your solution to be viable as-is. For example, "Hey Siri/Google, I can't move my hands. Call 911."

Your idea is probably a decent starting point for brainstorming a solution — it just needs more thought, research, testing, etc. And I wouldn't be surprised if a similar product already exists. (I'd actually be surprised if it doesn't already exist.)