①many thanks for your kind and warm help.
②i am greatly indebted to you for your help.
③ thank you for your generous hospitality.
④ it was really exciting to get your new year's card!
⑤ i'm sincerely grateful for all your help in finding me a place.
⑥your note of congratulations is deeply appreciated.
⑦thank you for doing so much to make my trip interesting.
⑧thank you for your kindness to have done me a favour.