Yes, the Hainan Airlines Bangkok Office can assist with flight changes, cancellations, and refunds. Passengers can visit the office in person or contact them via phone or email to request modifications to their bookings. The staff will guide you through the process, including any applicable fees or restrictions based on your ticket type. For cancellations, the office can help you understand the refund policy and initiate the process. It’s important to have your booking reference number and identification documents ready when making such requests. If you’re unable to visit the office, you can also manage changes online through the Hainan Airlines website or mobile app, but the Bangkok Office provides personalized support for complex cases.