You have been invited bu your friend to spend the weekend on his father's farm.write a letter accepting or refusing this invitation.

Hello,Daniel It is nice of you, that you have invited me to your fathers farm.I apreciate this very much.And i would like to come, but I can't.It is realy interesting to spend time with you but my mom said that I must help her at home.I hope that next time we necessarily will meet. Your friend Alex.