用英语写假定你是peter，给ellen发一封邮件，对他表示热烈欢迎，并向他确定他的到达时间和离开时间

Subject: Warm Welcome and Arrival/Departure Confirmation

Dear Ellen,

I hope this email finds you well. I am writing to express my heartfelt welcome to you as you plan your visit. We are very much looking forward to having you with us, and I assure you that we will do our utmost to make your stay enjoyable and comfortable.

To ensure that everything is arranged to your satisfaction, could you please confirm your arrival and departure dates and times? This information will help us in organizing your pick-up from the airport, as well as planning any activities during your stay.

Please let me know if there are any specific arrangements or requirements that you might have. We want to ensure that your visit is both productive and pleasant.

Looking forward to hearing from you soon.

Warm regards,

Peter