If you’re looking to manage your booking with Singapore Airlines, it’s quite straightforward. Simply visit the Singapore Airlines official website and click on the ‘Manage Booking’ option usually located at the top of the website. You’ll need to enter your booking reference number and last name to access your booking. Once you’ve accessed your booking, you can make various changes such as selecting seats, adding special services, upgrading your class, or even changing your flight. If you need further assistance, you can contact their customer service at +1-800-656-8469.