Also this is what it says on the 'My Trip' details page:

'There has been a change affecting your trip. If you are not satisfied with this updated itinerary, you may be eligible to change your flight(s) at no extra cost. ( Conditions Apply)
Be sure to check the latest Visa and Passport Requirements for each country you'll be stopping in or visiting.
If we are unable to accommodate a previously purchased Economy Comfort seat, Trip Extras or other trip purchases please select the 'Cancel' button to see eligibility. '