Dear Khun.Arunsri,
For low cost flight (Air Asia) I can’t hold booking because I must to issue ticket after I make the booking suddenly. So If you would like low cost flight you must to confirm for issue ticket as the same time for make booking because I always make booking for low cost flight by the website of the airlines. Please check price and confirm for make and issue ticket when you are sure for travel or you can make booking by yourself on the website of the airlines as details below,
http://www.airasia.com/th/th/home.page?cid=1
However I am glad to help you and make booking for passengers all the time.