How do I open my mouth let him accept my invitation?

Question

I want to treat a man a meal because he assist me in complete my applilcation letter. But I am afraid he will refuse me because I am not conversant with him.

However, I very want to repay for him because I am not only call friends when I need help.

Please tell me. If you are the one. Do you accept my bidding?

how do I open my mouth let him accept my invitation?

Answer 1

Send him a note inviting him to have dinner with you.

Answer 2

dinner is quite an intimate setting.... i would go more along the lines of lunch.  and all you'll need to do is simply approach him and say "it would mean a lot to me if you would let me repay you for the help you provided me by allowing me to take you out to lunch tomorrow."