Possibilities
Raelle was momentarily lost. She looked at Tang Hebe and said, "I don't have any memory of saving someone named Chi Xirui."
"Oh, it's possible you didn't know her name but just saved a nameless person in passing." She took a pause and added, "Or maybe you just don't remember it right now since it's been five years or so."
"Ms. Tang, you're the only one with memory gaps here, my memory is impeccable," was Raelle's reply. "So, I can assure you I'm not forgetting anything." Her eyes wandered around the ward aimlessly as she continued, "Also, what kind of a person do you think I am? Do I look like a kindhearted angel who does good deeds and forgets about them? I have always walked in a straight line in my life. I don't needlessly become nosy in other people's lives. So, to say that I saved someone just because I was feeling like it is certainly wrong. I don't do that kind of thing."