Formal Letter.

Dear professor Flybender,
                                             I am writting to you to talk about the machine I have bought last year on your garage sale. I am very surprised, that is why I am adressing this letter to you.I really do not know why is this machine so cheap. After all, you can travell anywhere and any time. I am thanking you because you sold me this machine. I have really enjoyed travelling to the middle ages with my clever friend Max. At first, he did not belive me when I told him that it was a kind of ''Time machine'' but he finally belibed me. I want to be as you are when I grow up. 
In your next etter, please, tell me how many days it took you to make the machine.
RSVP. ASAP