Https://mcmanuslab.ucsf.edu/sites/mcmanuslab.ucsf.edu/files/2025-07/live-talk-support-via-american-airlines-usa-contact-numbers-a-comprehensive-guide.pdf https://mcmanuslab.ucsf.edu/sites/mcmanuslab.ucsf.edu/files/2025-07/live-talk-support-via-american-airlines-usa-contact-numbers-a-comprehensive-guide.pdf