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5. User (Reservation): - When the user makes a successful search, the system will show a new GUI with all the details of the corresponding train. All the fields will be disabled for editing. - The following figure shows an example: - When the user presses the button "Confirm", the system will reserve the defined "number of Passengers" from the "Max Passengers" (The number of Max Passers will be decreased by the number of passers given by the user), and a confirmation message will appear