Dear K. Som,
I am sorry to have taken a few days to write this. (I was out of the office, with no access to my company mail.)
Thank you for having invited me to last Friday’s seminar. Attending it was very useful. It was great to be given some new details on Emerson’s product range, and to have a chance to see some of your products being demonstrated.
I would be grateful if you would pass a “thank you” to all who took part.