The demand and the reason for air travel have changed.

"They gave good service at a fair price; I see no reason to change."

The reasons the Government has given for the policy have changed over time.

This states that the package should not have more than one reason to change.

They also see no reason to change the class schedule.

The reasons for single parenting have been changing in recent times as well.

The reason I've been able to do that is the circumstances have changed.

I guess you might say that my reason for going there at all kind of changed.

The reason for resumption of the Order has not changed.

I'd never love anyone the way I loved him, but the reasons for our separating hadn't changed at all.