気にかけてくださり、ありがとうございます。
It is very thoughtful of you. Thank you.
Thank you for looking after me.
Thank you very much for your kind consideration.
Thank you for looking after me.
Thanks for worrying.
I am much [greatly] obliged to you for your trouble.
Thank you for your kindness when I was ill.
Thank you for the confirmation.
Thanks so much for your good thoughts.
親切にして下さってありがとうございます。
Thank you so much for your kindness.
Thank you for your letter.
Thank you for your commiserations.
そう言って下さるとはご親切にありがとうございます。
Thank you for using our services.
Thank you very much for your quick reply.