A research has been conducted to adapt a frame-based language model to a voice-driven pseudo-pilot system. A pseudo-pilot is used in the training of air traffic controllers. The model was derived in an evolutionary fashion: a first frame-based model was obtained for simple exercises. Then, a more complex type of exercises was analyzed and extensions to the simple model were identified to adapt it to the more complex type of exercises. Dialogue error handling mechanisms were also identified and modeled. KEYWORDS: dialogue, air traffic control, language model, error handling, frame