person A: Hi_comma_ I made a mistake at work last week
person B: Oh no!  Was it a big one or not that big of a deal?
person A: It was a big deal to me_comma_ but I don't think anyone noticed.
person B: Oh good.  Well_comma_ at least its a big deal to you because that means you're taking things seriously and concerned about your work.  
person A: Yes I guess I am.