Try this
- Choose one completed action you directly noticed. Describe its effect on your day rather than assigning a personality label.
- Keep any request about future tasks separate from the thank-you, so appreciation does not quietly become delegation.
A worked example
“Thank you for picking up the ingredients. Having them here meant I could start dinner without another trip.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Avoid adding “you should do that more often.” If you need a recurring arrangement, ask about it in a separate conversation where the person can answer freely.