How to say "I am from XXX country"+self introduction in Korean?

When you meet someone for the first time and you self-introduce in Korean..

*FORMAL*
Hello!
안녕하세요!

Annyonghahsaeyo!

My name is Yuchun!

제 이름은 유천이에요!

Jae irumeun Yuchun iaeyo.

I am from LA from the states(America)!

LA(엘에이)에서 왔어요!

LA aesuh watsuhyo.

Nice to meet you!

반가워요!

Baangga wuh yo.

*INFORMAL* - close friends, to your older/younger siblings, someone younger than you

Hello!
안녕하세요!

Annyonghahsaeyo!

My name is Yuchun!

제 이름은 유천이야!

Jae irumeun Yuchun eya.

I am from LA from the states(America)!

LA(엘에이)에서 왔어!

LA aesuh watsuh.

Nice to meet you!

반가워!

Baangga wuh.