It's very kind of you.
It's very kind of you.I hope you have a happy birthday party.【是一个生日邀请的】
好吧我无奈了，怎么听着怎么别扭……
我把原文给你们（翻译过的，英文打着好麻烦的）
非常感谢你邀请我在周五去你的生日派对，我非常愿意去，但是我需要在那天去纽约，It's very kind of you.I hope you have a happy birthday party.