Dear Mr/Mrs/Ms [last name of employer],
I might want to thank you for the exceptionally gainful experience that I had during my internship at [name of company] as a [name of department] assistant. It was an honor for me to be working with your group and I am exceptionally obligated to you for setting aside the effort to guide me.
The aptitudes I learned at [name of company] helped me build up a pragmatic comprehension to supplement the theoretical information I gained in school. The working environment culture at [company name] persuaded me to put forth a valiant effort and the assortment of undertakings I chipped away gave me an understanding of the internal functions of the business.
This internship has helped me in my choice to seek after a vocation in [field of work]. It will be a joy to stay in contact and look for your direction as I plan out my profession.
Your composed name