The airlines update the airfares every minute and are dynamic.
This change is reflected depending upon the demand and availability matrix at the time of booking. The time that you (or our agent) take to search the flight and make a booking may result in selling out of the inventories or the particular seats. In the meantime, the flight supplier offers different inventory, and the newly offered seats or class may be of a higher price. As a travel agency, we strive hard and keep on monitoring the updated fares and keep them current.