Does anyone have an email contact for this hotel?

I've booked 7 nights here in June/July but will be breaking up the reservation in 2 parts. We are staying for 5 nights & then taking a cruise to Helsinki. We will be back at the Sheraton a couple of days later for another 2 night stay before flying back home. I wanted to check with the hotel if it would be possible for us to store our luggage with them while we are on the 2 night cruise. Carrying everything with us would be a real pain.