根据对话内容判断正误。

Tom: Dad, Would you like to play ping pong with me?

Dad: Sure.

Tom: I can't find my ping pong. Where is it?

Dad: Is it in your desk?

Tom: Let me have a look. No, it isn't.

Dad: Tom, come here, please

Tom: Yes, Dad.

Dad: Is the ping pong under the bed yours?

Tom: No, it isn't. It's my brother's.

Dad: Look! There is a ping pong behind the door. It must be yours.

Tom: Oh, yes. Thank you, Dad!