根据句意或汉语提示补全对话。

Mike: What's ?

John: My father is (生病). He should see a (医生). So I can't go to the zoo with today.

Mike: I'm sorry to hear that. Don't be ( 担忧). We can go next time.

John: Thank you.

Mike: How does your Dad (感觉)now?

John: Not well. Let's go to the hospital.