It’s getting harder to distinguish real person vs AI on the phone

I’m looking for a rental and had to call a place after requesting a tour on Zillow. The “person” who answered spoke naturally and had a pronounced southern drawl. The person asked what I was looking for, etc, narrowed down the property they had which I was interested in. However I noticed if I paused while talking the person replied right away. For example when asking when I could do a tour I said “hang on let me check my calendar” and they immediately replied when I paused. Which I’ve noticed when using any LLMs talk feature.