A traveller login to the Smart Travel website by using his$/$her

customer$$s name and password. He$/$she inputs a date, from location and to

location to search flights. Once the traveller finds a flight, he$/$she

clicks the button to book an air ticket. He$/$she inputs payment details

and then clicks the confirm button. The Smart Travel server receives the

booking details and verifies the payment. If the payment is valid, the

server generates an air ticket and a receipt, then sends them to the

traveller.

Use the software tool UMLet to specify this process in a UML System Sequence Diagram