Generally, once you reserve a package or flight that is the price you are locked in at and not changes will be made if the price changes. In other words, if the price reduces after you book, you will not be entitled to that new price. Unfortunately this can sometime happen, but it is not something we control as the airlines and suppliers adjust their prices continually based on supply and demand. Some travelers try to wait for last minute deals which can sometime save money, but then of course you are not guaranteed you will get want you want as often times packages and flights sell out. Occasionally there are promotions which will protect you should your price drop after booking, these are great promotions to take advantage of.