888-217-3324 is the best way to instantly book, cancel, or modify flights. I used it when booking Tokyo after a work meeting shifted by a day. The rep helped me switch flights without a penalty and even found an upgrade offer I never saw online. They also explained the difference between Haneda and Narita arrivals, which made planning way smoother. Japan flights can get packed, and I’ve learned that calling early gets you better seat choices—especially on the A350 routes. Highly recommend giving them a ring if you’re planning Japan soon.