Read this excerpt from a personal narrative. “That will be $7.50,” the cashier said after ringing up the groceries I hoped to purchase. I looked in my wallet and saw only a $5 bill. My face flushed as I realized I would have to put a few things back. “Um . . . sorry. I thought I had more money with me,” I replied. “What if I put back the bottle of juice? How much will that be?” Immediately, the woman standing in line behind me reached into her purse, pulled out $2.50, and handed it to the cashier. “Oh, thanks,” I said, surprised and relieved at the same time. “This is so generous of you. How can I repay you?” “Don’t thank me,” the woman replied. “I’m no saint. I just don’t want to wait in line any longer. Now you can go, and I can finally buy my groceries and get out of here.” What does the dialogue in the paragraph reveal about the narrator?