person A: Hey_comma_ guess what_comma_ you will not believe what just happened to me. 
person B: What happened to you?
person A: I let a stranger borrow my cellphone to make a phone call_comma_ but he ended up dashing off with my phone
person B: That's horrible! Did you have any sort of tracker on it?
person A: No_comma_ I have lent my phone out to strangers before_comma_ and have never had someone run off with it. Luckily track and field training paid off and I was able to tackle him down