Dear Sir or Madam, I am writing to inform you that a seminar is going to take place in our company and I would like to invite you to give a presentation there. Your presence is a great honour for us.
Dear Mr Larry, I hope I have not caught you at a busy and critical time. Anyway, the reason, for which, I am writing this letter to you is that I am going to organize a seminar on “how to maintain a strict quality assurance policy” after a week, and I would very much like you and your team members from “procurement department” to give a presentation.