请英语高手帮忙翻译将这段中文翻译成英文,（不要用翻译器哦）谢谢!

Please actively participate in this meaningful and significant dinner party,which is devoted to send our heart-felt blessing and gratefulness to one of our nice workmate,who is about to leave,for her contribution and efforts on the work with us; on the other hand,it is to express our welcome and encouragement for our new colleagues.I will confirm whether you are most available on 6th or 7th and then inform you of the specific imformation of time and room number in the restaurant.