The _ga cookie, set up by Google Analytics, calculates customer, session and marketing campaign knowledge and in addition keeps keep track of of web page utilization for the positioning's analytics report. The cookie retailers info anonymously and assigns a randomly created amount to recognize unique visitors. American Airways’ AAdvantage program: https://businessflightshop.co.uk/blog/why-do-airlines-overbook-and-what-should-you-do-then/