The term in Thai law is pretty well defined: (italics added) Section 6. Whoever, for the purpose of exploitation, commits any of the following acts: (1) procuring, buying, selling, vending, bringing from or sending to, detaining or confining, harbouring, or receipt of any person, by means of threat or use of force, abduction, fraud, deception, abuse of power, or giving money or benefits to a guardian or caretaker of the person to achieve the consent of the guardian or caretaker of such person to allow the offender to exploit the person under his or her control; or (2) procuring, buying, selling, vending, bringing from or sending to, detaining or confining, harbouring, or receipt of a child; shall be guilty of human trafficking.
Merely giving a bus ticket or taking a paid person on a holiday would not fall within this definition.
http://web.krisdika.go.th/data/outsitedata/outsite21/file/ANTI_HUMAN_TRAFFICKING_ACT,B.E._2551_(2008).pdf