I forgot to tell you that I have to take care of some important matter. I'm still on the business trip,so We'll meet when I come back.外地出差(口语点的)-business trip,out of town...ect.不是一个字一个字的翻译
I'm sorry that i didn't leave you a message when i left, as there's a very urgent matter for me. I'm now at outstation, so we only could meet when i come back.