【帮我看看我的英语文章有没有错误好吗?DearMr.Gates,Thankyouforyourletterwhichconcernaboutreinstallingandupgradingoursystem.Wehaveto,however,finalisesomedetailsinadvance.I’mafraidthatthedateyouplannedisunavai】

　　帮我看看我的英语文章有没有错误好吗?

　　DearMr.Gates,

　　Thankyouforyourletterwhichconcernaboutreinstallingandupgradingoursystem.

　　Wehaveto,however,finalisesomedetailsinadvance.

　　I’mafraidthatthedateyouplannedisunavailablebecauseofouroriginallyplannedagenda.YourreschedulingwouldbehelpfulforusandIwanttoknowexactlyhowlongdoestheinstallmenttake?Furthermore,werequiretheengineertoinstallthesystemonweekendsothatitwillnoinfluenceourdailywork.

　　Inaddition,weneedtokeepbothofthesystemsinourcompanytoinsurethesafetyforamonth.

　　Ialsowanttoknowtheengineer’snameandnumberinordertoexchangeinformationefficiently.

　　Lookforwardtoyourreply.

　　Yourssincerely,

　　GregCai