Response to congratulation letter
Thanks so much for thinking of me.
It was so nice to hear from you.
I'm highly thankful to you for your kind and affectionate letter congratulating me on promotion (wedding, having a baby).
I felt glad to be surrounded by your love and blessings.
I guess I was just lucky.
I can assure you, it was a team effort.
I'm grateful for your wishes and greetings on the occasion of me becoming a mother.
Thank you for your support.
Reading your letter full of good words gives me happiness and fine feelings.