This paper investigates the design thinking process of a designer while solving a Human-Computer Interaction (HCI) design problem. HCI design requires a considerable amount of user information to take design-related decisions. HCI designers are often asked to think through the user's mental models and cognitively empathize with the users while designing. Due to this, designers collect and refer user data to develop more user-friendly products. But with increased use and reliance on user data to solve complex interaction design problems, it becomes important to investigate how the design thinking process of a designer is affected by the introduction of user information. The experimental study presented in this paper is aimed to understand the transformations in design thinking process with the introduction of user information.