Methods, apparatus, systems, and computer-readable media are provided for introducing a user to functions of various applications through interactions with an assistant agent. The assistant agent can correspond to an assistant application that can provide a user interface with multiple selectable elements, each of which can correspond to a separate application. When a user selects one of the selectable elements, a function of an application can be demonstrated to the user, in order that the user might become more familiar with functions of the application. In some implementations, a portion of the selectable element can be selected to cause information about the application to be presented to the user. This allows the user to have the option to try out or learn about an application before investing computational resources through downloading and installing the entire application.