answer: Kelly calls Mr. Chang to tell him the flight information and Mr. Chang will pick Kelly up at the airport.
documents: #Person1#: Hello! Is this Mr. Chang?
  #Person2#: Yes. Who is speaking?
  #Person1#: This is Kelly speaking. I am calling from London. How are you, Mr. Chang?
  #Person2#: Oh, Kelly, I couldn't recognize your voice. Well, I'm fine.
  #Person1#: Mr. Chang, I just want to tell you that we are leaving London for Beijing by flight CP 645 on Saturday morning. Could you meet us at the airport, please?
  #Person2#: Excuse me, I couldn't quite hear you. This line is crossed. Can you speak louder, please?
  #Person1#: I will say it again... Do you hear me now?
  #Person2#: Much better. I will definitely go to the airport to meet you.
  #Person1#: Thank you very much. Goodbye.
  #Person2#: Goodbye.