To be a pilot

This morning, I talked with my classmates about something we were doing these days.
One of my classmates said that he was learning how to operate a plane.
It was quite impressive.
I've never imagined that I might be able to meet a man who can operate a plane in person.
Actually, he looked a little bit calm, so I couldn't imagine him like that.
There are so many interesting people in the world.
It is for sure, isn't it?

To be a pilot

This morning, I talked with my classmates about something we were doing these days.
One of classmates said that he was learning how to operate plane.
It was quite impressive.
I've never imagined that I might be able to meet a man who can operate plane in person.
Actually, he looked calm, I couldn't imagine it like that.
There are so many interesting people in the world, isn't that true?

It sure is, isn't it? - is gramatically correct. "Isn't that true" is often used in conversations. 

Good job!