Dear …
I want to take this opportunity to extend my thanks to you all for the party that was given in my honor to welcome me to _(name of department/division)__. What a lovely way to be welcomed to a new team! I was touched by the cake and pastries provided and was delighted to see my new team members, along with so many others from different divisions, all there to welcome me. This came as such a surprise, but what a pleasant surprise! I thoroughly enjoyed myself and had a wonderful time chatting with everybody. I’m thrilled to be taking on these new challenges that await me and can’t tell you how much I appreciate everyone’s confidence in me. You are all such a great source of encouragement to me and it was truly a wonderful honor for me to be welcomed in this way.
Thank you again, for all your kind consideration towards me. The party was very thoughtful of you and I wish each of you nothing but the very best.
Sincerely,