Dear Nanthaphan,
Thank you for your email.
Just to confirm, yes, I had received your email, below, and we have been considering your request.
On this occasion, we have decided that we will offer you 20% discount for three people attending our 2 day course.
Please can you fill in the registration form and send it back to me. Please let me know the names of the 3 people that will attend.
I look forward to receiving your booking.