Acceptance of an invitation to speak at a conference / corporate event.
I am pleased and honoured to accept your invitation to [speak / host / be a panelist] at your [annual meeting / convention / conference / seminar] for [Company / Society] on [date].
As you are aware, I have a very keen interest in [topic] and would be very enthusiastic to [give a talk / raise awareness] about it. [Describe topic further – briefly outlining what you are planning to talk about.]
invitation to speak,