Mystery Shop At The Airport

When I go to the airport tomorrow, I have to go early enough to do a little work. As part of a mystey shop, I have to pretend to apply for a credit card. I have done it before, and it is not hard. You have to pretend you are just walking by and happen to see their kiosk. Then you go over and pretend to apply for a card with a fake social security number. You are supposed to observe their salesmanship, demeanor, the neatness of the kiosk, etc. And then, I might get to do it again on my return trip, if there is another sales rep working the desk. I want to make sure I do this well, because I just messed up another mystery shop with the same company, and I don't want to get a low score!