My son wants me to text his manager about the shift he agreed to

My sixteen-year-old has a weekend job at a small store. He likes having his own paycheck and, until yesterday, liked being the person who handled the messages about his shifts.

He agreed to work Saturday afternoon. Then a friend invited him to something Saturday afternoon.

Now he wants me to text his manager.

Not to explain a family emergency. Not because he can't reach anyone. He wants me to say we already have plans, because he thinks the manager will take that more seriously coming from me.

We don't already have plans. He does, and he made them second.

I said I could help him figure out what to ask, but I wouldn't send an invented family excuse. He said every other parent helps their kid with this stuff. I don't know what other parents do. I know he was happy to keep me out of the conversation when he was arranging extra hours last month.

The strange thing is that I can picture the text immediately. It would take twenty seconds. I could make it sound polite and firm. Then he could go with his friend, and we could all stop discussing it.

That ease is exactly what makes me hesitate.

I don't want to make his first job into a test he has to pass without support. He is still learning how to ask for changes and hear an answer he doesn't like. I also don't want my phone to become the exit whenever the answer might be no.

I asked what he had already said to the manager. Nothing. He has spent more time convincing me to send the message than it would take to ask himself.

This isn't about a rule for every workplace or whether a shift can be changed. I don't know their arrangements. He can ask the person who does.

Would you sit with him while he writes the request, then leave the sending to him? Or would you refuse further help because he already made the commitment? I think there is a middle ground. He currently thinks the middle ground is me sending the text but letting him choose the wording.