Dear , (the name of your friend),
I'm writing to you, because I want to invite you to holidays in Costa Rica.
There we can see a lot of national parks, do some entartement and also do some learning about nature. Details: The advertisment said that we can choose horse riding, mountain hiking, guided bird-watching and also see where see-turtels tay theirs eggs every year.
I think if we could go their it will be after a school year, may be at 5June to 10 june. We can stay there from 1 week to 1 month, it will depend on you. We will stay at the hotel, but near live my ant.
So, if you want to go with me , please answer me in one week.
Best regards,
(Your name)