A Dialogue System is a computer program designed to communicate with users through natural language. It can understand and generate human language, allowing for interactive conversations. These systems are often used in applications like chatbots, virtual assistants, and customer service tools, helping users find information or complete tasks. Dialogue Systems typically use techniques from fields like Natural Language Processing (NLP) and Machine Learning to interpret user input and respond appropriately. They can be rule-based, following predefined scripts, or more advanced, using algorithms to learn from interactions. This technology is essential for improving user experience in various digital platforms.