Thank you for inviting me. Thank you for sending me the invitation. It's very kind of you to invite me. I really appreciate your invitation. I'm thankful that you invited me. 如有问题,欢迎继续追问:)求采纳~
Thanks for your invitation. However, I am on the business trip now, it is unable to attend this training, also there is no other suitable person in our company, really sorry on this.