Welcome to the forum.
Originally Posted by snic
Please look at the corrections I have made to your post above in red.
Now try to write the letter yourself, post it here and we will look at it. We do not do the work for you. Please also tell us why you have to write this letter in English.
Also, please make sure the location information in your profile is correct. It says you are in Serbia. Your IP address says you are not in Serbia.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.