After writing "Dear..." it's a good idea to establish the main purpose of the letter straight away in your opening sentence. Here are some examples:
1. Formal letter (e.g. complaining to a manager)
I am writing to complain about the unacceptable state of the room I was given, and the unhelpful attitude of certain members of staff at your hotel.
2. Semi-formal letter (e.g. inviting a neighbour)
My wife and I would like to invite you to a dinner party at our home next Saturday evening.
3. Informal letter (e.g. thanking a friend)
I hope you're well. I'm just writing to say thanks for letting me stay over at your house while I was in London last week.
Great Simon. Really helpful..
Posted by: vivek | Sunday, July 08, 2012 at 16:40
Dear Simon,
Thanks a lot to put writings on General Training Module. Please enrich reading materials by the side of writing. Again many thanks as you would continue it.
Kamal
Dhaka, Bangladesh.
Skype: mdkamalhossain1976
Posted by: Md. Kamal Hossain | Monday, July 09, 2012 at 07:12