Assignation for prostitution means the making of any appointment to engage in prostitution, such as responding to an online ad and setting up a meeting time and place. It`s a charge that can be laid via undercover sting operations even if no actual encounter took place.
Discussing sex, money or sex and money is not necessary for an arrest. Having an ad online is all that`s needed.
Not sure this is true or not, found it interesting though.