Https://www3.hksyu.edu/eform/data/form_1150256/files/element_66_d7922b596e708ff91d412b3e8515028f-delta-airlines-tm-customer-service-usa-directly-contact-numbers-24-7-live-in-detail-guide.pdf.tmp https://www3.hksyu.edu/eform/data/form_1150256/files/element_66_d7922b596e708ff91d412b3e8515028f-delta-airlines-tm-customer-service-usa-directly-contact-numbers-24-7-live-in-detail-guide.pdf.tmp