How should Buddhists handle prayer requests?

Fairly regularly people ask me to pray for them or their family members. In my understanding, Buddhist don't generally pray for things to be different than what they are. But it never seems appropriate to mention this to a person who might be upset so I just say "of course" and leave it at that. But the truth is, outside of metta for everyone, I don't pray for such things as my neighbor's uncle's knee replacement operation or for my co-worker's daughter to advance in the state championship for soccer. So I'm lying to someone and that's uncomfortable and not a good mind state to be in. First, is my understanding that Buddhist don't generally pray for things to be other than what they are wrong view? And if not, what might be a better way to handle prayer requests?