Dialog 1 take its toll [ 損害、損失をもたらす ]

Angela:Hi! Great to see you again! Wow, you've really lost a lot of hair!
Yukio:I know. Stress will take its toll on you.
Angela:You must have a lot because your hair has turned grey, too.
Yukio:Hey, be nice!

Dialog 2 Nothing ventured, nothing gained [ 虎穴にいらずんば虎子を得ず ]

Yukio:I've decided to buy an RV for twenty thousand dollars. I'm going to live in it, too!
Angela:Are you sure you want to do that? That's all your money and you don't know anything about RVs.
Yukio:There's no better way to learn than by having one. This has always been my dream.
Angela:I guess you're right. Nothing ventured, nothing gained. Good luck!