1. Hi, how are you? (или: how are you doing/what's up)
2. What's your name?
3. Where are you from?
Если тебе симпатичен/приятен человек, можно усложнить разговор и спросить то, что тебя именно интересует в нем, например:
1. What do you like to do?
2. Who's your favorite (британская версия слова: favourite) celebrity (или: star)?
3. What are you interested in?
4. What's your favorite color?
5. Today I'm going to the party. Want to go with me?
6. Who's your favorite author?