“因故不能成行了”英文应该怎样翻译？

I am so sorry to tell you that I have to cancel the trip because of some reason.
商务信函语气可以礼貌些!

I have to cancel the trip for ....

.... 写原因就ok啦

The visit is canceled due to some reasons.

Trip has been canceled due to ...

so I can not go with you