Thank You for Overseeing My Workload during My Vacation –
[Name, Company Name & Address here]
This is just a short ‘thank you’ note for everything you did while I was absent.
It was a great help from your side for completing my assignments when I was on vacation. I know it well that you already had your own huge workload, but still you managed to complete my work too. You didn’t have enough time for your family last week because of this extra workload.
I am really thankful for your help. I would be happy to help you in return when you need sometime off from work for your family or anything personal in future.