[She makes a hum, one that combines the meanings of "I suppose there will always be idiots" and "you make a fair point", before smiling slightly, too.]
Well, I assure you I am not one such lunatic. Of course, if I was looking to deceive you, that is exactly what I would say... as is the fact that everyone here will confirm what I tell you. Perhaps you have no reason to believe any of us- I hardly would, when I arrived here much like you did, now...
[She pauses, deliberately.] You could ask our two resident musketeers. Neither of them is a particularly good liar, as I'm sure you know, so maybe you will believe them over me.