My view is that you need to transition slowly and carefully to AI first customer support.
1. Know the scope of problems an AI can solve with high probability. Related prompt: "You can ONLY help with the following issues."
2. Escalate to a human immediately if its out of scope: "If you cannot help, escalate to a human immediately by CCing bob@smallbiz.co"
3. Have an "unlocked agent" that your customer service person can use to answer a question and evaluate how well the agent performs in helping. Use this to drive your development roadmap.
4. If the "unlocked agent" becomes good at solving a problem, add that to the in-scope solutions.
Finally, you should probably have some way to test existing conversations when you make changes. (It's on my TODO list)
I've implemented this for a few small businesses, and the process is so seamless that no one has suspected interaction with an AI. For one client, there's not even a visible escalation step: they get pinged on their phone and take over the chat!