Hello John. What can we do for you?

喂，约翰！我们能帮你做点什么吗？

youdao

Hello John, how are you?

哈罗，约翰，你好吗？

《牛津词典》

Hello, John. Goodbye, John.

你好约翰，再见约翰。

youdao

Mr. JOHN DICKERSON (Political Correspondent, Slate): Hello.

NPR: Slate's Politics: State of the Union Specifics

"We had to be here to say hello to the new Papa, " she told the BBC, as John-Paul grinned.

BBC: Electric atmosphere as new Pope unveiled

Mr. JOHN HODGMAN (Actor): (In commercial clip) Hello, I'm a PC.

NPR: Ad Report Card: Apple's Sour Mac Pitch