Here is a neutral and interesting summary of the provided text: The article describes how to build an autonomous AI travel agent using LangChain, OpenAI tools, PostgreSQL, pgvector, and YugabyteDB. The agent uses a large language model (LLM) to perform tasks such as finding listings and managing bookings. To achieve this, the article outlines the role of each component, including LangChain's framework for constructing AI applications, OpenAI's LLM, PostgreSQL as a general-purpose relational database, pgvector for vector similarity search, and YugabyteDB for scalability and resilience. The article also provides examples of how to create tools such as an internet search function, a database query tool, and a booking creation tool using LangChain and the mentioned databases. By leveraging distributed SQL with YugabyteDB, the agent can handle large amounts of data and scale horizontally without sacrificing performance or availability.