Phoebe:Sit! Y’know, maybe it would just really, really help if you would just talk.

Rachel: Yeah, come on! What’s going in on in there? (Pats his chest.)

Monica: Yeah. And y’know, if you wanna cry, that’s okay too.

Chandler: Okay, look, I’m gonna have to ask you all to leave.

Monica: Come on! Chandler!

Chandler: Look, forget it. We tried, but Phase Three is a lost cause, Okay?

Explanation:

lost cause   something that has no chance of succeeding :
Trying to interest my son in classical music is a lost cause.

سعی بر علاقه مند کردن پسر من به موسیقی کلاسیک هیچ سودی نداره.