Find the appropriate booking on the Flight Bookings page, select it, and then submit your request on the next page. If the change/cancellation cost is indicated as "0," your booking qualifies for a free change/cancellation according to the airline's rules. Please be aware that once your request is submitted, processing will start right away, and you won't be able to retrieve your original itinerary. Your request won't be carried out right away if the fee is still pending confirmation. Instead, a customer service representative will call you after confirming the cost on your behalf.