when you make a reservation at hyatt.com, I believe there is check box for "honeymoon couple", and small comment box. I just put a check box on"honeymoon couple" and wrote requesting suite upgrade on the small comment box. Luckly, I was upgraded to all of the property that I went to during my honeymoon.hyatt valencia, orange county, monterey, and hignlands inn. All of them gave me choice for diamond amenity too,even though I was a platinum member back then.