Following is a data flow diagram for an airline reservation system. It shows how passengers, airline staff, and the flight database interact. Passengers can search for flights, book their tickets, and get a confirmation. Airline staff manage the flight schedules, update the flight data, and look up booking information. The system handles payments via a payment gateway. It confirms transactions and sends updates on flight data and status. This DFD helps users and the system communicate well. It makes flight bookings and management more efficient. A strong database and safe payment processing are key for a smooth user experience.