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The spoken language is the most natural interface for a human being and, thanks to the scientific-technological advances made in recent decades, nowadays we have voice assistance devices to interact with a machine through the use of natural language. Vocal user interfaces (VUI) are now included in many technological devices, such as desktop and laptop computers, smartphones and tablets, navigators, and home speakers, being welcomed by the market. The use of voice assistants can also be interesting and strategic in educational contexts and in public environments. This paper presents a case study based on the design, development, and assessment of a prototype devoted to assist students' during their daily activities in a smart campus context.