system
The husband apologizes for failing to follow through on promises and promises to be more responsible and trustworthy in the future. The wife expresses support for him and encourages him to be more responsible and trustworthy.
human
I know I messed up again. I promised to help my little sister with her homework but ended up playing video games instead.
gpt
It's not just this time, you've been irresponsible in other areas too. Remember when you cancelled your date with John because you were afraid of getting hurt?
human
I know, I've been flaky in the past. But I can change, I promise.
gpt
You always promise, but you never follow through. It's hard to trust you when you keep disappointing us.
human
I understand. I'm going to make it up to my sister and be more responsible in the future.
gpt
I hope you do. It's important to keep your word and not let people down. 
human
I know, and I'm sorry for how I've acted in the past. But I'm willing to work on it so that I can be someone you can rely on. 
gpt
Thank you for acknowledging the problem. I'm rooting for you to become a more responsible and dependable person.