https://www.missioncsc.org/wp-content/uploads/formidable/2/official-southwest-airlines-customer-service-live-person-support-an-assistance-guide.pdf https://www.missioncsc.org/wp-content/uploads/formidable/2/official-United-airlines-customer-service-live-person-support-an-assistance-guide.pdf https://www.missioncsc.org/wp-content/uploads/formidable/2/official-Expedia-customer-service-live-person-support-an-assistance-guide.pdf