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.