Most TJ escorts do not have a visa. So you cannot have a session with most TJ escorts in the US.
There are a few escorts that have visas; they may or may not be willing to see you in the US. If they do you'll pay more--which is only fair.
Generally speaking escorts with visas do not advertise their status. (The last thing they want is to lose their visa and/or get busted in the US where prostitution is illegal.) After you get to know an escort well she may tell you she has a visa. The same with escort agencies. After they know you well they may tell you about escorts that will see you in the US.