Conversational human-machine interfaces Rodríguez-Sánchez, María Jesús Benghazi, Kawtar Griol, David Callejas, Zoraida Dialogue systems, conversational systems, human-machine communication, speech-based interaction, natural language processing, voice user interfaces, conversational AI, artificial intelligence This chapter presents an overview of existing technology and methods for developing conversational human-machine interfaces. Specifically, current approaches for the development of dialogue systems are described, also focusing on the different objectives that the dialogues may have, either to solve particular tasks or to hold open chit-chat conversations. Additionally, research challenges are identified, providing an outlook for future conversational systems. 2025-02-01T07:34:02Z 2025-02-01T07:34:02Z 2023-07-19 book part https://hdl.handle.net/10481/101707 10.1002/9781119863663.ch11 eng open access Wiley-IEEE Press