How to persuade a person to travel together?

Tell him (her) that the travel agency has made a reservation, all the money has been paid (this is a relatively large sum), and all the travel supplies are ready. I will pick you up for a trip to XX on X, and she (he) doesn't need permission. . . . Of course, it is best to find out what happened to him (her) that day. Buy off his (her) friends if you feel unsure.