学海无涯常见英文商务邀请函写作范例Dearsir/madam:I’mdelightedyouhaveacceptedourinvitationtospeakattheConferenceinon.Asweagreed,you’llbespeakingonthetopicfromto.Therewillbeanadditionalminutesforquestions.Wouldyoupleasetellmewhatkindofaudio-visualequipmentyou’llneed.Ifyoucouldletmeknowyourspecificrequirementsby,I’llhaveplentyoftimetomakesurethatthehotelprovidesyouwithwhatyouneed.Thankyouagainforagreeingtospeak.Ilookforwardtohearingfromyou.Sincerelyyours,