Office. According to Article 2 of the Financial Management System of the Commission for Discipline Inspection and Supervision of High-tech Zone (new urban area), department personnel shall go through the formalities of business trip examination and approval according to procedures, and air tickets shall be purchased by the office in accordance with regulations. Therefore, the office responsible for training and buying plane tickets in the system. How many departments in a company are responsible for such and such artifacts? If there is a business trip in the company that needs to buy and book air tickets, most units are in charge of the office.