We are traveling to Geneva on 6/2. We have booked business class tickets with a connection in IAD. The issue is our flight out of TPA leaves at 847 am and we would prefer a later flight to have a shorter connection and not have to wake up so early. When i try to change it online it gives me absurd pricing or no availability, which is understandable. However, we are ok downgrading to economy on the first domestic leg to make this happen. Is this something i can do online? i tried calling this morning but got disconnected after 30 mins...so before calling back i thought i'd ask here. thanks. this was all booked on united.com btw

edit we are also ok connecting anywhere else as long as its a one stop flight