I sent a nearly identical email to Marriott, Hyatt, SPG and Hilton asking them if I could get a higher status given my status as Platinum at AA. With Hyatt, Hilton and Marriott I previously held higher statuses (5+ years ago) and expressed to them that I was getting back in the travel game and would stay with them a lot if they bumped my status. Marriott, Hyatt and SPG each sent a quick reply stating that they don't match airlines. Hilton hasn't responded yet.