Need an AI chatbot using OpenAI for an e-commerce store

I want a simple AI chatbot built in Python using the OpenAI API for my e-commerce store.

The chatbot should:
Take user input and reply with AI-generated responses.
Be able to answer using my knowledge base (which I will provide once I accept your proposal).
Work like a store assistant, helping users with basic product information, order status, and common FAQs.

Nothing advanced is required, just a clean and working chatbot example that I can test and use for learning