I try to keep it short and sweet.
"It's been wonderful speaking with you today. As usual our converstaion was enlightening and entertaining. I wish I had more time to converse but alas, I must go. So until next time please remember that I look forward to speaking with you again"
"It's been wonderful speaking with you today. As usual our converstaion was enlightening and entertaining. I wish I had more time to converse but alas, I must go. So until next time please remember that I look forward to speaking with you again"