No, you will not be talking with an AI when you call 911 (At least in no more cases than when you get a recording now) 911 centers are not private corporations they are public utilities therefore there is zero profit motive to reduce headcount and the public would not stand for any politician that would seek to replace humans with AI.
Yes what will happen is that AI systems will assist 911 operators, off loading tasks and improving response times and outcomes they will assist by coordinating response units, accessing databases of previous successful outcomes to previous similar events, and examining patterns to predict and preposition first responders for faster response times.