The Technical Solution:

1. Each new user message is captured via webhook or frontend interface
2. The workflow maintains a conversation array in n8n, storing all previous exchanges
3. When a new message arrives, it's appended to the existing conversation history
4. The complete conversation context is passed to OpenAI Assistant API
5. OpenAI processes the request with full awareness of prior exchanges
6. The response is captured, stored in the conversation history, and returned to the user

This implementation requires minimal setup: n8n (v1.28.0+), OpenAI API credentials, and an OpenAI Assistant already configured. The workflow handles all the memory management transparently.