Does it mean anything when a cute girl tell you have a nice day or was she just being nice as an employee?

I was buying something at target and saw this really cute girl near the registers. Anyway she told me which register is open and then after buying my stuff she told me have a nice day. I mean she didn't have to say that. Was she just being nice as an employee or could it mean something else?
Does it mean anything when a cute girl tell you have a nice day or was she just being nice as an employee?
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