A: Hello, can I speak to Ryan please?
你好,我可以找Ryan听电话吗?
B: May I ask who's calling?
我能请问是谁打来的吗?
A: This is David.
我是David。
B: I'm sorry, David. He is not in the office now.
不好意思David,他现在不在办公室。
A: Ok, I'll just call back later then.
好的,那我一会儿再打过来。
B: All right. Bye!
好的,再见!
A: Bye.
再见。