根据下面的对话，在每个空白处填上一个适当的句子，使对话的意思连贯完整。

A：The May Day holiday is coming.

B： Yes.？

A: Yes. I want to go to visit Luoyang.

B: Great. It's a beautiful city. ？

A: My parents and my little brother.

B:?

A: By train. Its safe and cheap.

B: That's true.？        

A: For two days, May 1st and 2nd. I can visit the most places of interest there.

B: That's OK.！                                

A: Thank you.