https://airtravelopedia.helpshift.com/hc/faq/20-ways-to-reach-united-airlines-customer-support-by-phone-chat-and-email-easy-troubleshoot-guide/
https://airtravelopedia.helpshift.com/hc/faq/21-ways-to-reach-american-airlines-customer-support-by-phone-chat-and-email-the-best-travel-guide/
https://flightguider.helpshift.com/hc/en/3-my-app/faq/11-how-to-call-spirit-airlines-customer-service-for-flight-and-travel-booking-issues/