Backchannel Chatter
I shall roll.
The way I usually handle acting is, its a contest of the player's acting skill (modified as the GM sees fit) vs. the target (in this case the steward's) IQ. The 'average' adult person has a 10 IQ typically.
So player rolls vs. her Acting Skill (as modified by GM if applicable) and DM rolls vs. the steward's IQ. If Alice's roll had a margin of success higher than the Steward's margin of success for IQ, then Alice manages to 'fool' the other by her performance. If the steward wins, he sees through her performance and knows she's being a disingenuous drama queen (ie, 'crocodile tears').
Even if both parties FAIL their roll, the contest still works. If Alice fails by LESS than the steward fails, she still dupes him.
Here goes 'nuthin!
08:47, Today: Alice Kelley rolled 7 using 3d6. Alice 'acts' like a damsel in distress (skill 11).
Oh good, she succeeded by 4. I shall let you roll for your NPC steward.