ToWhomItMayConcern，
IwouldliketothankyouforaskingmetogoforaninterviewnextMondayat10:00a.m.
Unfortunately,Ihavejustbeendiagnosedwithaseriousearinflection,whichrequiressurgeryonthesamedayastheinterview.IamsorrytosaythatIwillthereforenotbeabletomaketheinterview,andIapologizeforanyinconveniencethismaycauseyou.Ifpossible,Iwouldliketopostponetheinterviewuntillaternextweek.
Iamlookingforwardtohearingfromyou.Andagain,Iamsosorryforanytroublethatmayhavecausedyou.
Yourssincerely,
LiMing