This book constitutes the refereed proceedings of the 8th International Workshop on Chatbots and Human-Centered AI, CONVERSATIONS 2024, held in Thessaloniki, Greece, during December 4-5, 2024. The 12 full papers and 3 short papers were carefully reviewed and selected from 35 submissions. They were organized in topical sections as follows: Understanding and Designing for Human-AI Interactions; Human-Centred AI in Education and Social Support; Conversational AI for Citizens and Customers.