Today is Sunday. Yang Ling is ill. She is at home.
Yang Ling: Hello, this is Yang Ling speaking. May I speak to Su Hai?
Su Hai: Hello, this is Su Hai speaking.
Yang Ling: I can't go to the library today.
Su Hai: What's the matter?
Yang Ling: I have a cough.
Su Hai: I'm sorry to hear that. Take care.
Yang Ling: Thank you. You can go with Su Yang.
Su Hai: OK.