Dear ________,
It’s always a worry to leave on a trip during the winter holidays, especially when leaving a home that’s fully stocked with gift items for Christmas. I had originally planned to just lock up the house tight and depend on timers for turning lights on during the evening. But your offer to house sit for us while we were away was extremely generous and thoughtful. And your nightly text messages that all was well, helped my wife and I TO relax and get a good night’s sleep! Thank you so much for your kindness.
(YOUR NAME HERE)