Dear Mike,
I'm very glad to receive your letter.I know you must be very upset when facing strangers or speaking in public.After learning your situation,I looked up a lot of materials to help you solve your problem.Now I'm writing to tell you some techniques of talking.I definitely believe that you will become a popular and sociable person if you can act as these techniques.The key points are as follows:
Firstly,you shall keep smile when talking.A nice smile can make good impression on others and people will find it easy to approach you.Usually,people will smile back after they receive a smile.
Secondly,you shall look in the eyes of the listener.Avoid looking around when talking,because it makes people feel that you don't take the conversation seriously.
Thirdly,after learning what the talker have said,you shall nod your head to show your agreement,which will embark the talker to talk more and more.People will find that you are a person who's easy to get along with.
Fourthly,you shall raise your head,stand still and relax yourself when talking.That will make you well-organized and concentrate the attention.
You shall keep exercising according to the above method.There’s an old saying that no pains,no gains.Besides that,you shall encourage yourself frequently and remind yourself that you’re a strong person.I believe with the above techniques,sufficient exercises and strong determination,you will be successful in the near future.