I'll be there at the time which was appointed for our meeting. 我将在我们约定的会面时间到达那儿。
One of you may have misunderstood the time set for your meeting,and this way,the guest isn't left thinking that you were simply late. 你们当中可能有人把安排的会面时间搞错了,这样的话,就不会让客人认为你迟到了。