This isn't a scripted demo
There's no decision tree behind this and no canned response list. QUIRA is querying a real product database — the same way it would query yours — and answering from what it finds.
When it tells you something is out of stock, it checked. When it recommends a product, it read the catalog. When it declines to answer, that's a guardrail doing its job, not a gap in a script.
The demo store is small, so the catalog is limited. On your store it'd have your full catalog, your policies, your tone, and your rules.