What to do first
Open the message and write down the new flight number, new date and new times. Compare them with your original booking and with any connecting flights, hotels or meetings. Then go to the manage booking section and see what alternatives the airline is already offering. If nothing suitable appears, contact them by phone or chat the same day. Have the booking reference ready and state clearly that the new time does not work for you.

Possible next steps
First step is to accept the new flight if the shift is small and still fits the rest of the trip. This costs nothing and keeps the original ticket intact. Confirm the new times in writing so you have a record.

Second step is to request a different flight on the same day or the nearest possible day. Ask for options that keep the same route or a very close arrival time. You may face a change fee or fare difference, but same-ticket changes are usually easier than starting over.

Third step is to cancel and look for a completely new ticket if the offered alternatives are unusable. Check how much of the original fare can be refunded before you cancel. On many tickets only the taxes come back when the move was small and still within acceptable limits.

Risks
Waiting until tomorrow reduces the number of free or low-cost alternatives. Accepting the new flight without checking connections can make you miss the next leg or a hotel booking. Cancelling too fast without asking about the refundable amount can cost more than necessary. Online tools sometimes show incomplete options at short notice.

The best move when time is short
If the new time still works with everything else, accept it and update your ground plans. If it does not work, contact the airline today and ask for the nearest alternative that keeps you on the same ticket. Only cancel after you know the exact refundable sum and have checked the price of a replacement flight. Acting the same day you receive the message gives you the widest choice and the lowest extra cost.

Summary
A moved flight is common and usually fixable if you react on the day the message arrives. Note the new times, check the airline’s own alternatives, then decide between accepting, changing to another flight on the same ticket, or cancelling. The safest first move is to contact them while options still exist and before the departure gets any closer.