Try this
- State your earlier yes and your current change clearly so there is no ambiguity about which plan applies.
- Identify any practical consequence you can help address. Keep that help realistic rather than offering a new promise to soften the change.
A worked example
“I said yes to hosting, but I need to reconsider. I know that affects your plans.”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Offer to discuss the practical adjustment without pretending the change has no consequences.