In this paper we presents an automatic training tool (ATT) for air traffic control officer (ATCO) trainees. It was developed using our cloud-based speech recognition and text-to-speech systems and allows dynamically generate the content. Our system significantly expands the available training materials, allowing ATCOs practice the basics of communication and phraseology. Furthermore, the automatic training tool is designed generally to be used for teaching in various areas, from specialized skills to a simple general knowledge.