person A: I got a scary call from my nieces earlier this week. Apparently no matter what they did_comma_ they could not awaken her from her sleep.
person B: Wow_comma_ that must've been awful! How did it all turn out?
person A: I apologize_comma_ they couldn't wake my sister up.  Thank God she ended up being okay_comma_ the EMT's checked her out...we have no idea what happened.
person B: That sounds really scary_comma_ I'm so glad it all turned out fine.