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.