Build an AI Powered Phone Agent 📞🤖 with Retell, Google Calendar and RAG

This Workflow simulates an AI-powered phone agent with RetellAI with two main functions: 📅 Appointment Booking – It can schedule appointments directly into Google Calendar. 🧠 RAG-based Information Retrieval – It provides answers using a Retrieval-Augmented Generation (RAG) system. For example, it can respond to questions such as store opening hours, return policies, or product details. The guide also explains how to purchase a dedicated phone number (with a +1 prefix) and link it to the AI agent. This setup is cost-effective, as it uses a FREE $10 credit to operate without additional charges in the beginning. ✨ Advantages 🕐 24/7 Availability – The AI agent can answer calls and assist cust

Help me set up the n8n workflow "Build an AI Powered Phone Agent 📞🤖 with Retell, Google Calendar and RAG" (https://n8n.io/workflows/3563). It uses: HTTP Request, Telegram, Google Drive, Google Calendar, AI Agent, Basic LLM Chain, Embeddings OpenAI, OpenAI Chat Model, Structured Output Parser, Token Splitter, Default Data Loader, Qdrant Vector Store, Vector Store Question Answer Tool. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.