@Bernadette408 If the construction will be an ongoing problem for the remainder of the guest's stay, there is nothing you can do to convert her into a happy client. It's not a problem you can send someone over to fix, so the best offer you can make is the opportunity to cut the booking short, relocate, and take a refund for the unused nights of the stay.
Granted, it's been a full week since the guest complained, so it may be too late for any kind of resolution to be effective. It's possible that the guest is simply fishing for a free stay, which is insanely common these days.
If the construction genuinely causes a very significant and persistent noise problem that wasn't disclosed, it might be worth a token discount to all the affected guests - your listing opens with the word "quiet," which is a feature that might have been oversold in this case. But sometimes guests' problem with construction is more of an aesthetic distaste, which doesn't merit any resolution. It's important for either you or a local co-host to be present at the property and aware of any conditions that might affect a stay, so you know what action is appropriate to take. Otherwise, it's very easy for a serial complainer to rob you blind.
