Make a private letter which is sent to your brother because you cannot come to visit him in different city because you have to go study-tour in Bali. Don't forget to write you real name as the sender of your own letter.(buatlah surat pribadi untuk saudara laki laki kamu karena kamu tidak dapat hadir ke kotanya dikarenakan kamu ada pendidikan diBali) buatlah dalam bahasa inggris!
I'm sorry I can not visit you to your Town because i got a lesson at Bali.Maybe next time I could visit you at your Town.
Many Regrets
Your Brother/Sister