Work With Me: email - daniel@ Try VAPI - Ready to build a complete AI Receptionist? In this tutorial, we use Vapi and n8n to create an advanced, human-like voice AI that can schedule, reschedule, and delete appointments directly with your calendar and database. ✅ Full Appointment Management: Build the Vapi function calls and n8n workflows to schedule, reschedule (update), and delete appointments. ✅ Advanced Knowledge Base: Learn how to add a custom knowledge base to your Vapi assistant using external files (like PDFs or text) so it can answer specific questions about your business. ✅ Prompt Engineering: We'll write a robust system prompt with a defined personality (persona) and critical safety rules to set boundaries for the AI. ✅ Error Handling in n8n: See how to build reliable workflows that can handle errors gracefully as the AI talks to your APIs. ✅ Live Demo: Watch the AI receptionist handle a real call, schedule a meeting, and then reschedule it. Chapters: 00:00 Intro & Features Overview 01:45 Setup Vapi With AI Model 02:52 Prompt Engineering 05:39 Initial Prompt Demo 06:52 Appointment Management Prompt 07:55 Function Calling with N8N Workflow 10:32 Schedule Appointment Demo 12:37 Reschedule & Delete Appointments Walkthrough 14:25 Reschedule & Delete Appointment Demo 15:41 Reschedule & Delete Appointments N8N Workflow 17:08 Mini System Dashboard 17:45 Internal and External Knowledge Base 19:18 Internal and External Knowledge Base Demo 20:42 Production Ready Error Handling Subscribe here: @tech4gods?sub_confirmation=1