どうもありがとうございました.
Thank you very much for that. I appreciate it.
I appreciate everything you've done for me.
こちらこそ、どうもありがとうございました。
あら、ありがとうございます。
Thank you all so much.
Thank you for your letter.
Thank you for looking after me.
Thank you. I appreciate that.
I appreciate your hard work.