It sometimes works in your favor too. I booked my Civic in April of last year. Due to backlog (God knows what in reality), my car was delivered in July, but the fiscal budget was announced in between which for some reason cut the prices of the cars. Honda refunded me nearly ninety thousand at the time of the delivery.
Also it was mentioned specifically on the booking letter that the price prevailing at the time of delivery will be the final (charged) price.