Recently I had to try to do a task using our software because the person that normally uses it was not available. The process sucked and I quickly made changes

Recently I had to try to do a task using our software because the person that normally uses it was not available. The process sucked and I quickly made changes to make it much more useable. The person was nearly in tears after trying my fixes. I asked the person why they never said anything and they said they thought it would be too hard to fix (it wasn't) and that I always seemed busy so they didn't want to bother me.