Question

letter to elder sister on her birthday . she is away from home, studying in a boarding school.

Answer 1

Dear sister, 
I hope your doing well. I'm fine, too. This year, around the time of your birthday, i made several preparations to surprise you, such as your favorite cake, candles, gifts, decorations, etc. 
However, when i discovered that you wouldn't be returning in time for your birthday, i got disheartened. 
I understand that studying for your finals was tough enough, that now you'll be giving an exam on the day of your birthday. 
I hate that your exams had to be postponed. 
Don't be too sad, as I'm sending you the gift i personally picked out for you.
I hope you like it as I put a lot of thought into it. 
I miss you, come back soon. 
Your brother, 
Max.

Answer 2

Dear sister,

Hope you are doing well and we are also doing good here.

I wanted to tell you that I so very much miss you on your this birthday.

I was really wondering why you are studying in a boarding school.

Remember, how much fun we had on your last birthday? Come soon and we will have double fun in this vacation.

  Your loving Sister

 XYZ