So this woman has been cutting my hair for about 3 months, 5 times total over that span.

Every time I go in the conversation is more fluent and has gone from pointless banter to legitimate conversation.

That latest time I went I had her laughing a lot, the pitch of her voice kept changing to a warmer one.

My Question: How do I know if she is just doing her job and flirting to get a tip or she is genuinely interested?