Koffo textile is a lost textile of the Sangihe-Talaud that is used by the Sangir people as clothing, accessories, and household fabric. However, due to Indonesia’s colonization by the Dutch East Indies in the 1800s, the art of the Koffo textile began to die until 1979 when it was officially declared as extinct. To preserve the dying culture, this paper describes a development of a vertical chatbot called Widya based on Dialogflow. The chatbot covers five topics on the Koffo textile, with which users can interact. The chatbot is then evaluated via a User Acceptance Testing (UAT) to evaluate the effectiveness in educating users on the lost Koffo textile. The vertical chatbot is hoped to revitalize the Koffo textile in the current modern age and fulfill various Sustainable Development Goals (SDGs) by the United Nations to be able to motivate users and Indonesian natives to preserve the long-lost forgotten Koffo textile.