I have a co-worker who will very often ask me to do things he could easily do himself, when they are not my responsibility. Often something like this.

Him: "Hey, I wanted to talk to you and Jim about XYZ."
Me: "Sure, does noon work for you? I could discuss it then."
Him: "Yes, send us a calendar invite."

or

Him: "Hey, I am looking for the XYZ file."
Me: "I think Katy has it"
Him: "Can you have her to bring it to me?"

On its own this is not a big deal, but it happens all the time, and can interrupt my workflow to stop and deal with that small thing. However I don't know how to bring it up without sounding like I am not a team player.

Fwiw it is a co-worker, not a superior asking me this. I technically am slightly more senior than him, but to me this is not an issue of hierarchy rather one of courtesy.

Am I over-reacting? How can I bring this up without sounding like I am making a big fuss out of assisting with a trivial task?

I have a co-worker who will very often ask me to do things he could easily do himself, when they are not my responsibility. Often something like this.

Him: "Hey, I wanted to talk to you and Jim about XYZ."
Me: "Sure, does noon work for you? I could discuss it then."
Him: "Yes, send us a calendar invite."

or

Him: "Hey, I am looking for the XYZ file."
Me: "I think Katy has it"
Him: "Can you have her to bring it to me?"

On its own this is not a big deal, but it happens all the time, and can interrupt my workflow to stop and deal with that small thing. However I don't know how to bring it up without sounding like I am not a team player.

For what it's worth, it is a co-worker, not a superior, asking me this. I technically am slightly more senior than him, but to me this is not an issue of hierarchy rather one of courtesy.

Am I over-reacting? How can I bring this up without sounding like I am making a big fuss out of assisting with a trivial task?