fortunately/unfortunately

(1)I went for a walk in the park on Sunday.
unfortunately, I saw a fierce dog.
fortunately, the owner of the dog was
coming.
unfortunately, the dog was agressive.
fortunately, the owner of the dog took
away immediately.

(2)it was my birthday last week.
unfortunately, I forgot my birthday on
date day.
fortunately, my friend was remind me.
unfortunately, I was busy to cellabrate my
party.
fortunately, all my friend gave me so many
present.

(3)we went out for a meal last Saturday.
unfortunately, our car was broken.
fortunately, another friend was coming to
helped us.
unfortunately, his car ran out of petrol.
fortunately, petrol station just near the
road.

(4)There was a really good film on Tv last
night.
unfortunately, Suddenly it was blackout.
fortunately, it was in a few minutes.
unfortunately, the film was finished.
fortunately, I can watch it in internet.