https://www.devex.com/people/how-to-add-a-lap-infant-to-a-United-flight-after-booking-aa-2352855
https://www.devex.com/people/aa-booking-a-ticket-for-a-lap-infant-on-United-airlines-2352959
https://www.devex.com/people/how-to-add-an-infant-to-your-copa-flight-reservation-2353320
https://www.devex.com/people/steps-to-add-a-lap-infant-to-your-existing-copa-ticket-2353374
https://www.devex.com/people/steps-to-add-a-lap-baby-to-an-existing-singapore-airlines-reservation-2353574