Click to call and a real agent picks up on the same infrastructure customer agents run on. It answers in under two seconds, asks what you need, qualifies you the way it would qualify a caller, offers a real calendar slot, and sends a text summary when you hang up.
Not whether it sounds human — most modern voices do. Measure time to first audio, whether it handles you talking over it, and what it does at the edge of its knowledge. A confident wrong answer is the failure mode that costs money, and it is invisible in a scripted demo.
This demo has a generic knowledge base. A customer agent is trained on their transcripts, their pricing tiers, their service-area rules, and their escalation policy, and it writes the booking into their real dispatch system. The stack is identical; the knowledge and the integrations are the build.