下面的句子用英语怎莫说？

I am very busy today, will contact you some day later!By the way, I will have a business trip for a week tomorrow!Contact my secretary for any questions or send me short messages.

I am not available today, let's catch up the other day! For your information, I would be out on assignment for a week from tomorrow on. Please leave a message with my secretary or send me an SMS in case you need a discussion with me.

I am busy today, so pls. contact me at another time. By the way, I will be on business trip for 1 week from tomorrow. Any urgency, pls.contact my secretary or send message with mobilephone. thanks

I am busy today , please contact me the other day. By the way , tomorrow I will have evection for a week. Anything else could contact with my secretary or contact with me by mobile text.