A user interface can be evaluated at different stages of the software development cycle. Formative evaluations are those that are made throughout the design process, before the system is finished, and often before a single line of code is written. Within semiotic engineering, the modeling language MoLIC (Modeling Language for Interaction as Conversation) aims to support the reflection of the designer during the HCI design. However, there is no specific method to evaluate interaction solutions prepared with MoLIC. Aiming to support the evaluation process of a solution represented in MoLIC, this work presents MoLIC WOz, a computational tool that emulates the user-system interaction represented in a MoLIC interaction diagram. The tool makes this interaction through the Wizard of Oz (WOz) technique, where a user interacts with the system being operated by another person (the Wizard). The goal of this work was to analyze how MoLIC WOz promotes reflection to its user, who plays the role of experiencing the emulation of system’s interaction. To assess this proposal, we conducted a study with twelve participants interacting with the tool. The results of this study indicate that MoLIC WOz has potential to support the communicability evaluation of MoLIC interaction diagrams through induced reflection. Further studies with the tool are suggested to verify other ways that support formative evaluations of this model.