Do u let "strangers" use your cell phone in an emergency ?

This morning I allowed a young lady to use my cell phone. This was while I was at Wal Mart. I have seen her around time many times before. I think she has a crush on me. 🙂 She asked me to use my phone so she can call her mother. I gave her that look you know. 🙄 But once she let me know who she was gonna talk to, I let her use it. It was no problem. But I rarely do this. I normally do not let anyone use my phone at all. Was I right to do her a favor. Do you let strangers use your phone in an emergency, or not.