I have a multi city award ticket booked. Got an email yesterday saying there was a schedule change for 2 of the legs. I have the original email that I got when I booked the reservation, and the departure is off a few hours from where it was originally.

My problem is that shortly after I booked the flights, I changed the airport from JFK to EWR. I do not have an email from when that was changed that tells me the original time of departure. Would they be able to access the original itinerary that I had when I changed from JFK to EWR if I called them? I would like to fly home Saturday instead of Sunday but dont want to incur the change fees. If the time was changed then I can switch it for free to any flight that has open seats in the class I am booked, if I read previous posts correctly.