Booking a Seat
When you make your booking ask the airline how soon before depature a seat allocation can be made
I booked in January to fly KLM in early July last year and only received "flight confirmation"
They told me the seats would be released "nn" days before departure and I should call back then - I did it on line (April time) and had no problems
PS - The aircraft type used by KLM to Manila is a Boeing 777 I found this to be a much better aircraft than the B-747 - the seat configuration is 3-3-3 compared to the 747 configuration of 3-4-3 I found the lower passenger load made for a better flight
Plus the inflight entertainment was significantly better than the 747 as each seat could individually select the movie of choice from about 100 features