The booking bug that taught one team never to let the model name the service
A team running WhatsApp and phone booking agents for gyms, spas and clinics found their agent booking the wrong service: a customer asking for the intro class had the free text passed straight into a booking catalogue with hundreds of items. The fix was taking naming away from the model, so the agent qualifies what the person wants and maps it to a specific catalogue ID. Reading the matched item back to the customer before confirming would catch most of the remaining errors.