Answer:
Explanation:
I'm not sure why your brother / sister cant come on holiday or where your going but you could use this as a template:
Hi ______,
As you probably already know, my family were planning on going on a holiday to ________. At the last minute my brother / sister couldn't come because ________, and mum and dad said your'e able to come with us instead if your parents allow that.
Were going to be going to _______. (Describe the place. Maybe add details about attractions, shops, ect)
If your able to come i know you will love it because _________ (give a few reasons why your friend would enjoy the place)
Let me know what you decide,
Kind regards,
__________
Of course you will need to add allot more detail, more info, and it will probably need to be longer, but i hope this will help you start
