After your booking for the flights is submitted, it could be held for a limited time, depending on availability of the seat and the policy of the airlines. If you do not process the payment or answer our email, we will automatically cancel your flight. If your flight was booked urgently for next day or same day, it might not be held. You have to make prepayment for the current flight, then our ticketing agent will confirm with you after issuing E-ticket.