From : The Secretary of the English Literacy Society of (school's name)

To : Mr. R. K Sharma
 Dear Sir,      
        I want to invite you to our school to join in with our English Day celebrations. I would also like to ask you to give us a lecture on the future of English in India. Please send us your confirmation by this week.                                                                    Thank you so much


from: (school's name)

to: mr. r.k sharma

respected sir,

I (your name) principal of (school's name) invite you to our school to give a meaningful speech to our students on the future of English. if you are free enough to this small work I will be greatful to you.

thanking you,

(your name)

(school name)