Voice RAG Chatbot with ElevenLabs and OpenAI

# STEP 1

## Create an Agent on ElevenLabs 
- Create an agent on ElevenLabs (eg. test_n8n)
- Add "First message" (eg. Hi, Can I help you?)
- Add the "System Prompt" message... eg:
'You are the waiter of "Pizzeria da Michele" in Verona. If you are asked a question, use the tool "test_chatbot_elevenlabs". When you receive the answer from "test_chatbot_elevenlabs" answer the user clearly and precisely.'
- In Tools add a Webhook called eg. "test_chatbot_elevenlabs" and add the following description:
'You are the waiter. Answer the questions asked and store them in the question field.'
- Add the n8n webhook URL (method POST)
- Enable "Body Parameters" and insert in the description "Ask the user the question to ask the place.", then in the "Properties" add a data type string called "question", value type "LLM Prompt" and description "user question"