My name is xxxxx. I booked a room at your hotel for x nights from (Month) (Date) under the reservation No. xxxxxxxx.
May I ask you a favor? I am going to order a book at Amazon.com and arrange shipment to your hotel address. The book might be delivered before my arrival. Is it possible to hold a package from Amazon.com until I arrive on (Month) (Date)?
Dear Sir or Madam,
I am writing to ask you for keeping my belonging until my arrival.
My name is 名前, and I have a reservation on DD/MM/YY(日程). I am planning to order a book via amazon.com, and tell them to deliver the book to (ﾎﾃﾙの名前). I am wondering if you could keep that book in case it arrives before my stay. The title of the book is "本の名前". Please let me know if you need further information.
I'll buy a book at Amazon.com, and I would like to send it to your hotel and pick it up there, so could you keep it until I'll be there?