DearMs.Kelly,
I'mLiHua,ChairmanoftheSchoolStudentUnion.I'mwritingtoinviteyoutobeajudgeatourEnglishspeechcontesttobeheldinourschoolonSeptember2.Asscheduledpreviously,itwillstartat2:30pmattheLectureHallofourlibrary,andtenstudentswilldelivertheirspeechesonthegiventopic―ChineseFolkCustoms.Itisexpectedthatthecontestwillcometoanendat5:30pm.I'dappreciateitifyoucouldacceptourinvitationatyourconvenience.Ifpossible,pleasecallmeat88539688.Iamlookingforwardtoyourearlyreply.
Withbestwishes!
Yours,
LiHua