In Korean, you say "안녕하세요!" (annyeonghaseyo).
"No, I do not, as we live in a pretty small apartment."
"Yes, I have been to Europe, the United States and Thailand. My favorite place so far to visit has been Germany!"
"I am a student. I work on the side at Tinder with their marketing team, but occasionally I tutor people in English."
"I would just tell them to learn about Korean history, and hopefully they will one day come to visit."