RESERVATION HANDLINGS FOR DUPLICATE BOOKINGS
Thank you very much for your patronage always.
In order to provide confirmed space reservations for as many customers as possible, Japan Airlines may request that duplicate bookings be cancelled, particularly when flights are full. At the time of such request, JAL will concurrently impose a time limit as to when the duplicate booking must be cancelled.
When a duplicate booking is not cancelled within the requested time limit, JAL will cancel the duplicate bookings. The remaining booking will be selected as follows:
1) The booking that was most recently confirmed in each flight direction will remain
OR
2) In cases of concurrent confirmation, the booking reflecting the earliest flight departure in each direction will remain
Please refer to the 
conditions of carriage sec.8(E) 'cancellation of Reservations made by JAL' for further details.
We appreciate your understanding and cooperation.
