As dumi has already commented, you need to be more humble when asking help. So, you need to rephrase most of your sentences to adopt that tone in your letter.
I will come tomorrow at morning so you also have to stay at night
This sentence sound pretty rude. Also, the reader does not get any idea as to what you mean.
Please care my house and specially my cat.Please take care of my house and especially my cat.
Anyone who visit my house tell him that I am outside of town and will come tomorrow.If there will be any visitors, please tell them that I have gone out of town and will be back the next day.