My ESTA is valid until Jan 2016. I am holding an Australian passport valid until 2017. I already made one trip to USA in May 2014. I will travel from Australia to USA in Sep 2015.
I have updated the new address where I will stay during the second visit on the web site of US Custom Border Protection. However I am still concerned about the flight details (airlines, flight number etc...) which I could not update.
Why not, or how do I, or need I not?