Please ensure the e-ticket you receive has e-ticket number and airline reference. This means the reservation has been booked and ticket has been issued.
As for seat number, many full service airlines now charge for Economy class seating; Business & First class seat selection remains free. If you wish to pre-book your preferred seating, please contact our reservations team for assistance. Otherwise, seat selection can be made during online check-in (online check-in opens 48-36 hours before flight departure)
Do note, if you have booked a code-share flight, online check-in may not be available.