As there are increasingly more interconnected objects with processing capacity, computing gradually disconnects from the desktop computer as it becomes more open to new computer formats and new interfaces. Talking computers and voice interfaces have been extensively explored in films and fiction books such as Her, 2001: A Space Odyssey and I, Robot, among others. However, it is not only in science fiction that the voice user interface appears. It became more common these days as a form of interaction in several devices like desktop computers, smartphones, smartwatches, smartTvs and videogames. This interface is also adopted in virtual assistants that help its users in all sorts of day-to-day functions such as scheduling, annotations, weather forecasting, alarm clocks, and smart objects control, and some of the virtual assistants have been developed with a humanized approach, adopting a name and a personality. The focus of this research was the relationship of users with these voice interfaces and personified virtual assistants, and how they are being received: how is their adoption taking place, what are the opinions and expectations of its users, and what problems do they encounter? The hypothesis of this research is that the personification and the adoption of conversational interfaces in virtual assistants facilitates its acceptance and makes the opinions about it more positive. To answer this question, a bibliographical review and a field research were carried out in two stages with an online form and focus groups. The questionnaire was applied in order to investigate the adoption and use of voice assistants by people living in Rio de Janeiro, and to recruit participants to the focus group. The focus group aimed to explore the acceptance and opinions of these users about the personified virtual assistants that use the voice as interface, and to map their difficulties and their expectations for the future of technology. The result shows that the personality of these assistants facilitates their adoption and has positive effects on user perception, but voice interfaces still generate discomfort when used in the public environment. The major concerns users faced while using voice assistants were not technical or usability problems but worries about the impact of the assistants on society and people s lives.