[ Given the circumstances it's understandable why Viktor shoots down the suggestions he offers up. And while Cassian is by no means frustrated, he still offers the man somewhat of a wry look. ]

If you don't want suggestions then you should say so.

[ He lets out a sigh, a look of understanding flitting across his features. ]

Being upset about something is a valid response to what's happened. But I don't think continuing to be upset about it later is the answer either.