Dear _________,
I always respect your opinion, so when I came to you yesterday for advice on a career change I am considering, I was thrilled to learn you had so many great suggestions for me! This week I am mapping out the pros and cons of each opportunity that has been presented to me. After I whittle things down to a final decision, I will update you on the end result. Thank you so much for your recommendations and guidance.
(YOUR NAME HERE)