Ответ:
Dear Mary,
you asked me whether I have the person that annoys me somehow. Well, I guess I have one. This is my cousin Nick. He is so childish and loud that when he is at ours I can't concentrate. Also, he can't behave seriously and wants others to pay all the attention to him. Moreover, he thinks that everybody must do everything he tells them to do. So I think you see where the problem is.
And do you have such a person? Tell me about the reasons for disliking them. Look forward to hearing from you soon.
Best wishes,
Your (name)