Q1 read the case study and answer the questions below.

Airline reservation system is a system used for booking tickets over internet. Any customer can book ticket for different flights. Customer can book a ticket only if the tickets are available. Customer searches for the availability of tickets then if the tickets are available, he books the tickets initially filling the details in a form. Tickets can be booked in two ways by i-ticket or by e-ticket booking.

In case of i-ticket booking customer can book the ticket online and the tickets are couriered to particular customer at their address. But in case of e-ticket booking and cancelling ticket are booked and cancelled online sitting at the home and customer himself has to take print of the ticket but in both cases amount for tickets are deducted from customer account.

For cancellation of ticket, the customer has to go at reservation office then fill cancellation form and ask the clerk to cancel the ticket then the refund is transferred to customer account. After booking ticket the customer has to checkout by paying fare amount to clerk.

C) Draw the sequence diagram for the above case study.