邀请信是一种礼仪文书，用于向帮助、关心和支持过自己的集体（党政机关、企事业单位、社会团体、学校、医院等）或个人表示感谢的专业书信。以下是一封英文作文的范文：
Dear Alice,
I am writing to extend my warm invitation for you to attend our annual company party. The event will take place on December 31st at the Grand Hotel, from 7 p.m. to midnight. This is a special occasion where we celebrate our achievements and milestones over the past year, and it would be wonderful if you could join us.
The evening will feature delicious food and drinks, live entertainment, and a variety of fun activities that are sure to keep everyone entertained. There will also be awards given out to recognize the contributions of various employees, including yourself.
I hope that you will be able to make it to this special event. Please let me know if you require any further information or assistance with transportation arrangements.
Thank you so much for considering my invitation. I look forward to hearing back from you soon.
Best regards,
[Your Name]