https://uroc.ucmerced.edu/sites/g/files/ufvvjh1421/f/webform/contact-methods-lufthansa-airlines-customer-service-number-an-all-inclusive-guide_0.pdf
https://uroc.ucmerced.edu/sites/g/files/ufvvjh1421/f/webform/contact-methods-united-airlines-customer-service-number-an-all-inclusive-guide.pdf