In Sept I tried to book on line and the booking was always rejected so I telephoned the Kingfisher telephone support office and they told me several sites but as I spoke with the lady, each booking at sites she was suggesting during our telephone conversation was rejected until she finally suggested Travelocity. So I finally got booked on travelocity.ca.
I fly DXB-CCU return and the booking shows up OK. Now to try to purchase an upgrade option before I fly...