I appreciate and thank all of you with all of me, About due to get help from the [......] Director of Flight Services Division, [... , ...]Administrative staff, other officials from the Flight Service Division and Airside Operation Department, The cooperative education other student thank you for help me about my work. [.......][ lecturer of cooperative education] about giving instructions to do this cooperative education and report as well. For any mistake that may occur. I admit liability sole and willing to listen to advice from all who come to study to be useful and knowledge.