Try this
- Name the start and expected end of the assignment, along with what is still uncertain.
- Choose a realistic contact format and a review point if the assignment extends. Keep visit plans tentative until dates are confirmed.
A worked example
“For the next three weeks I can usually call on Sunday, but weekday evenings are uncertain. Let’s review when the return date is clear.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
When the assignment ends, ask what contact now fits. Do not assume every old or temporary expectation automatically carries forward.