Try this
- Write the cooperation you would like and your own fallback as separate statements.
- Check that the fallback is an action within your control. Do not present a punishment for refusal as if it were merely a personal limit.
A worked example
“I’m asking for earlier notice. If that isn’t possible, I may make my own plan.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Keep your stated action within your own choices rather than making a threat about theirs.