Answered by Narendra
Travel prices are live, which means they can move between the moment you search and the moment you pay. Airlines and hotels adjust their own rates continually based on demand, so a short delay while you decide can occasionally change the number you see.
This is normal across the whole travel industry and not a sign that anything has gone wrong. When a price does change before you pay, the site shows you the current figure so you are always agreeing to what you will actually be charged, never a stale number.
If you see a change you were not expecting, take a moment to confirm the new total before continuing. The price is only locked once the booking is confirmed and paid, so completing the booking promptly when the figure looks right to you is the surest way to hold it.