https://erherhrhs.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-puedo-llamar-a-delta-m%C3%A9xico

https://community.truecaller.com/forums/topic/6983-does-lufthansa-allow-free-changes/

https://www.orangetractortalks.com/forums/threads/25-ways-to-call-to-how-to-reach-a-live-person-at-carnival-cruise-speak-with-a-rep-instantly.75420/

https://intercom.help/infanthelp/en/articles/11637032-how-to-add-an-infant-to-my-delta-airlines-flight-delta-call

https://erherhrhs.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-hablar-con-una-persona-de-delta-llama

https://intercom.help/infanthelp/en/articles/11637028-united-airlines-support-for-adding-an-infant-after-booking-hide-guide

https://www.orangetractortalks.com/forums/threads/ten-ways-to-contact-how-to-speak-to-an-agent-at-southwest-through-contact-options-a-complete-step-by-step-guide.75412/

https://intercom.help/infanthelp/en/articles/11637026-adding-an-infant-to-your-united-airlines-booking-help-guide-full-process

https://erherhrhs.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-hablo-con-una-persona-de-delta-estados-unidos

https://intercom.help/infanthelp/en/articles/11637024-what-to-do-if-you-forgot-to-add-your-infant-to-an-united-flight-helps-support