Dear ... 
Thank you so much for taking the time to interview me today for the __(type of position)__ position. 
I felt a great rapport with you and your staff and now I am even more convinced that I would fit in beautifully as a member of your team.  I’m so pleased that you agree my __(name of skill)__skills would be an asset. 
Please feel free to contact me for more information.  I can make myself available for any further discussions at your convenience.  Again, I really appreciate you and your staff for taking so much time to talk with me about this exciting opportunity.  I look forward to hearing from you soon. 
Sincerely,