拒绝邀请信首先还是要对对方的邀请表示感谢;然后具体说明自己无法接受邀请的原因，并对无法出席表示遗憾;最后表达自己的祝愿，即祝愿自己未能参加的会议或者活动能够顺利进行。那么英文拒绝邀请信范文该怎么写呢?
DearProfessorWhite,
Manythanksforyourletterdated15thAugust,invitingmetoattendand
chairasessionoftheforthcoming2004InternationalConferenceon
ParallelDataProcessingtobeheldinBellaire,Michigan,fromOctober25to28,2004.
Muchtomyregret,IshallnotbeabletohonortheinvitationbecauseI
havebeensufferingfromadiseasesincethissummer.Iamfirmlyadvisedthatitwouldbeunwisetoundertakeanydistantandlongtravelinthenearfuture.
IfeelverysadtomisstheopportunityofmeetingyouandmanyothersinthefieldofComputerScience.Iwishtheconferenceacompletesuccess.
Faithfullyyours,
WangXuan