Hi Gayathri,

I am just providing structure for your application. 

Create application and add Stages like Booking,Payment,Resolution

add Steps

Under Booking:

               1) Search Fights

                        fields:  From , To and Search button to show flights

                2) Select Flight

                            Show book button besides each filght to book that flight

Under Payment

                1)Enter Traveller Details

                             Add Name,DOB,Mobile Number,Email id fields

                2) Select Seat

                              Show list of seats for selection

                3) Proceed to Payment

                         Show payment method

Resolution

                set status as resolved

You can add properties to each steps and Run the application

Hope this helps

Thanks..!