A system for executing a multimodal software application includes a mobile computer device with a plurality of input interface components, the multimodal software application, and a dialog engine in operative communication with the multimodal software application. The multimodal software application is configured to receive first data from the plurality of input interface components. The dialog engine executes a workflow description from the multimodal software application by providing prompts to an output interface component. Each of these prompts includes notification indicating which of the input interface components are valid receivers for that respective prompt. Furthermore, the notification may indicate the current prompt and at least the next prompt in sequence.