A single system for a dental clinic, with two connected flows. The patient writes on
WhatsApp or the website widget and gets answers grounded only in the clinic's knowledge base
— hours, services, prices, insurance — with conversational memory and human handoff
on emergencies and out-of-scope cases. When they fill out the appointment form, in under 30
seconds the AI qualifies the lead (urgency, service, value) and writes to HubSpot: Contact,
Deal, Task and Note, with an automatic confirmation email.
Results
Chat reply in <5s, 24/7 from the knowledge base · lead qualified and written to the CRM in <30s · 0 hallucinated answers · 12+ edge cases tested, including prompt injection and human handoff. Stack: n8n, GPT-4o-mini, text-embedding-3-small, Neon PostgreSQL + pgvector, WhatsApp Business Cloud API, HubSpot CRM, Resend.