Write a short story about a conflicted snail named Dina that has dreams about becoming a pilot. Make it a story for children and use expressive and colorful language.
Every day, Dina opens up her yellow backpack and pulls out her velvety green notebook. She writes down three words, "Airplane, Helicopter, and Jet" just before the bus arrives for school. Ever since Dina was a baby snail, she had dreams of becoming the first Snail Pilot of her generation. All her life she saw butterflies and beetles cross the sky in wonderful delight and could only sigh with envy. She made up her mind some time ago that although she did not know which kind of plane she wanted to fly, she would still be determined to become a pilot. 

The school bus honked two times before Dina and her brother Lin rushed out of their house leaving a steady stream of snail snot behind them. On the bus, Dina's friend Poly asked her which aircraft she is piloting today. As she does every day, Dina grabbed her velvety green notebook and opened up to the word "Jet" highlighted in pink snot. "Today, I am a pilot of a private jet. I fly over the cities and travel through different countries. Want to hear where I am flying to next Poly?" Poly smiled and nodded her head. She was Dina's best friend and was always a part of her journey.