There's no surefire way to do it. Sometimes I'm talking with them while I'm getting somebody else to call up 911 and get police and an ambulance to them, and that has been successful on a number of occasions. Other times, if I have a better rapport with the person, I'm able to feel a bit more secure and I'm able to keep talking without taking that choice out of their hands. There's no hard and fast answer. You have to hope you can just develop a connection with them, that they can trust you, that they can feel what you're saying, and that you can give them a reason to get through the next short time.
The more things they have around them—family, in particular—the more successful that's likely to be, but no matter what, you're kind of rolling the dice. It's not a fun situation to be in, and you're having to do an ongoing risk assessment. Every 30 seconds I'm asking myself whether the situation has changed, whether I need to call 911 now.
The biggest one is if they're alone. I try to get them not alone. Once there are other people physically present with them, normally they're a lot safer. You want to get them to open up to that. I do most of this, of course, online or by phone.