AI agents are autonomous programs that can gather input, reason about collected data, and act on the knowledge they have in order to achieve a goal. They are ideal assistants for handling complex problems and provide increased efficiency and availability by offering 24/7 support for a subset of problems. AI agents can also personalize interactions using previous interactions and customer profiles to provide context and memory to conversations. However, they require good design, transparency, documentation, and testing to be robust and trustworthy, and considerations such as data privacy and security must be taken into account. Twilio offers tools like AI Assistants, ConversationRelay, Twilio Segment, Seamless hand off via its omnichannel communications platform, and Twilio Functions to help build and host conversational AI agents.