[Translation from Japanese to English ] I'd like to re-schedule our next lesson since I can't make it due to my work ...

Original Text / Japanese

仕事が入ってしまった為、今度のレッスンの日にちを変更してください。
13日が希望です。時間は何時でも大丈夫です。
いつも申し訳ございません。

Translation / English

I'd like to re-schedule our next lesson since I can't make it due to my work schedule.
The 13th is preferable, at any hour.
I hope it won't be too much a problem for you. Thank you very much, as always.

Translation / English

Would you mind if I change the date of next lesson since I have got a work on that day.
I prefer 13th and am available anytime that day.
I'm sorry for bothering you every time.

Translation / English

I'd like to reschedule our next lesson because I've just found out that I will have a schedule conflict with my job. I prefer the 13th. Any time on the 13th will work for me.

I'm sorry for the change. I hope this wouldn't cause you too much of inconvenience.

Thank you.

Translation / English

I would like to change the schedule of the next lesson, because I have got a urgent work. I prefer the 13th day, at any time. Thank you for your kind cooperation in advance.

Translation / English

Would it be possible to change schedule for the up-coming class? I have to work on that day and the 13th is preferable. Anytime of that day would work by the way. Sorry if this is causing any inconvenience.