I need some help with this letter, importante!!!

Hi, I need help correcting this letter, i'm learning english, and, i need to sed this letter, is very importan for me(i will send it by email)
Is very short, but is the first attempt.
ttanks
here it goes:

Dear Mr.

My name is ..........., last summer I went to . There I could saw your awesome .... Machine. And that’s the reason I’m writing to you, to enquire about the possibility of doing business with you. I quite interested in administrating franchises or selling your products, in ..




Yours faithfully