Learn how to build a sophisticated conversational chatbot agent from scratch using OpenAI's Function Calling for GPT-4 and GPT-3.5-Turbo in this comprehensive tutorial video. Explore the process of creating an agent with conversational memory, internal thoughts, and tool-using capabilities. Dive into topics such as OpenAI function calling, generating function instructions, implementing agent code, and adding conversational memory. Gain insights into the inner workings of OpenAI Functions Agent and discover how to create agents that can answer questions with or without tools. By the end of this tutorial, you'll have a solid understanding of building advanced chatbot agents using cutting-edge AI technologies.