Develop a context diagram and level-0 Data flow diagram for the following case study:
Develop a context diagram and level-0 Data flow diagram for the following case study:
Online Flight Reservation systems are a set of applications that support the direct contact between an airline and its passengers. The reservation systems contain airline schedules, fare rates as well as passenger and ticket reservations. The reservation system allows customers to make reservations via the use of internet and mobile phone applications. There are three user levels within the ticket booking system: User, Agent, and Administrator. Users have basic permissions in the ticket booking system, can search the desired destination, choose a seat and make a payment in one click. Agents are users who can manage the functionality and have access to all features within the system. The administrator can manage every aspect of the system, has visibility to all features, and changes system settings. Using the searching functions, you can select a round trip, one way or multi-city, enter the city you are going to fly from and fly to, tick whether it is a business trip or not. By pressing the details and baggage fees, you will be shown detailed information about the flight. Here you can review some essential information about the flight, see flight and baggage fee details, change flights if it is necessary and then continue the Booking process. Only by filling in all the information, can you jump to the Payment page to pay online for the ticket.
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