谁能给我写个3分钟英语3人对话啊?关于环境保护的.

A:Hello!
B:Hello,it'nice to meet you.
A:It' nice to meet you,too.I called you a lot day.But the phone was busy.Where were you?
B:Well,I'm went to school and help our school janitor.
A:Did you chean the school?
B:Yes,I did.The school is very dirty!We musn't throw rubbish on the floor.We shoud throw them in the bin.
A:You are right.I remenber.
B:Yes,Goodbye!
A:Byebye!