Guidance from those using AI as an assistant

I have a lucrative contract that’s basically already mine. The problem is the physician I partnered with retired suddenly. Neither of us has been able to find a replacement in his specialization. It’s amazing how hard it’s been for either of us.

Looking at the specialization‘s list of qualified physicians, I have at least 3500 contacts with phone numbers only. I am aware I can use AI to make calls, but how well does that work? Will they all just hang up upon realizing they are talking to an AI assistant? Is there a better way to reach 3500 people qualified for this lucrative deal?