"Of course sir, I agree that we should talk to him since he is the best lead to finding Potter in a reasonable time." Gray personally didn't think the Weasley's would be willing to be that helpful but having Robards there to be more forceful might help.
She flushed as Robards suggested she didn't think that he didn't know what he was doing. That hadn't been her intention. "No, that's not what I mean sir, just saying it's a lot different from our side of the wall. And we don't have any authority there."