Airline Ticket Reservation

I travelled to France for my exchange program by Air France at the beginning of this year. I had booked the tickets online for my journey there. This was very convenient. However subsequent modifications to the reservation could not be made online. I was notified that any changes would now require me to go to the Air France office. This was quite inconvenient. Also when I was in France, changes to my reservations could be made only at the local office. As I was in a new country, locating an office and going to it was quite challenging. An online service at this time would have been very helpful!