Thank you for your help.谢谢您的帮助。
对某人的帮助表7K感谢，-可以说Thank you for helping me out with...。

Thank you for helping me out with my paper. / I appreciate your help with my paper.
谢谢您帮我准备这份文件。
I'm grateful for your help.
非常感谢您的帮助。
It's very nice of you to help me.
您能帮助我，真是太好了。
It's really thoughtful of you to do that.

您这样做真是太体贴了。

Thank you for the invitation.谢谢您的邀请。
这个表达还可以说成Thank you for inviting me.或者Thank you for having me.。让我们看看下面的例句。

Thank you for the invitation to your party.
谢谢您邀请我参加这个聚会。
Thank you for inviting me and my family.
谢谢您邀请我和我的家人。
Thank you for having me. The dinner was great.
多谢款待。晚餐棒极了!