用英语就以下主题进行对话:为儿童节计划一个聚会

A:Hello,I'mXXX.Nicetomeetyou.B:Nicetomeetyoutoo.I'mYYY.A:What'syourmajor?B:I'mmajoringinZZZ.A:Owhoa,that'sadifficultmajor,yo