Try this
- State which old agreement has ended and summarize the new action, timing and ownership.
- Update shared calendars or task lists only for agreements both people recognize. Leave unresolved points clearly open.
A worked example
“The temporary Sunday call has ended. Our new plan is to choose a time each Thursday; no recurring slot is reserved.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Check that the practical tools match the conversation. A clean summary should clarify the current arrangement without rewriting earlier plans as mistakes.