Since the bank employee did not see the customer alter or change a deposit ticket or reduce the amount of cash they were holding, I would not automatically consider this structuring. It sounds like the customer made the inquiry, was handed the brochure and then handed the cash right over.
Of course I'm sure you plan on monitoring the deposits into the account for the forseeable future! A few more deposits such as this in a short time-frame that deviate from the customers normal pattern would be cause for concern.
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I use to think I was a smart cookie before I started working in Compliance. Now, I have mastered the art of the blank stare!