This is a small acknowledgement of your kindness.
I'm very grateful for your sympathy.
His achievements command our profound respect.
I cannot thank you enough for your great support.
Thank you very much for your hearty hospitality.
I appreciate your thoughtfulness very much.
I offer you my heartfelt thanks for your great kindness.
This is a quick note, but I'd like to thank you.
I can convey a sense of gratitude to you.
I must confess I've despaired of my husband; he's so shiftless.
I would like to express my heartfelt gratitude for your kindness.