Try this
- Identify which plans depend on precise timing. Choose a window, a confirmation point, or an independent alternative.
- Agree on one update method so the person traveling does not have to send repeated explanations from every delay.
A worked example
“I can’t promise dinner at seven while the route is disrupted. I’ll confirm after the final transfer; please eat earlier if you need to.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Do not treat an estimated arrival as a confirmed time. Review the routine if disruption continues rather than repeating the same failed schedule each week.