I checked the seatmap on Expertflyer for your flight, and in economy class there are only four seats available (all random middle seats).
With the current availability of seats it would be impossible for you to sit together (I would have to assume you are booked in economy).
It seems rather strange that all people have already been assigned seats more than two weeks before departure...

With a bit of luck you may get an op-up if the flight is as full as the seatmap shows.