Xiaopan, if the phone rings, you can answer it first. Don't be too nervous.

But I'm a little afraid of saying the wrong thing. I don't know what to say.

That's okay. You can start by saying: "Hello, this is the Bureau of Culture and Tourism."

Then if the caller asks for someone, how should I respond?

You can say: "May I ask who you're looking for? I'll transfer your call."

What if that colleague isn't here?

You can say: "He isn't available right now. You can call back later, or I can take a message for you."

I understand now. When answering the phone, I should greet the caller first and then respond politely.