Question

you are invited on a birthday celebrations of a friend but cant be present their due to unavailable  circumstances. write a reply letter
    

Answer 1

Dear friend,
                 Hi how are you i got the letter that u posted to me.but unfortunately i have an important exam on that day,so i cannot attend the function.Anyway iam sending you a camera as a gift with this letter.send me your birthday pics as soon as possible.
  convey my regard to aunt and uncle.                         
  
                                                                                                 yours lovely,
                                                                                                 <your name>
<address>
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_______
________
______.  

Answer 2

hello,

how are you. I am fine here and hope the same for you. I received your invitation card yesterday but I can't attend as me & my parents are going out. I wanted to come but my father told no. happy birthday in advance

yours lovingly,

(your name)