Going abroad

I prefer the window seat on the plane , because l can see the view from the sky when the plane takes off and lands. I don’t like having the airline meal , cause it isn’t always doesn’t delicious ,but sometimes the cookie of airline meal is not bad. When l’m was (because you say last year) on a journey to Japan last year, although the arrival time is on time (better to say: we landed on time) going through the customs took me a long time. Japan’s custom officers are work slowly in working. They opened my suitcase to check whether I was carrying restricted goods, and l had a talk about my working-holiday experience in Japan to with (because: have a talk with sb/talk to sb) the friendly custom officers.

Going abroad

I prefer the window seat on the plane because l can see the view from the sky when the plane takes off and lands. I don’t like eating the airline meal because it is never tastes very good but sometimes the cookie is not bad. When l was on a trip to Japan last year, the flight arrived on time but going through customs took a long time. The Japanese custom officers were working slow. They opened my suitcase to check if I was carrying restricted goods and l had to explain my working-holiday plans in Japan to the friendly custom officers.

Great job! I only changed a few words to make it sound more natural :)