[Vivi looks properly contrite for running into the lady, giving an embarrassed laugh as she bows her head slightly in apology.] I'm sorry! I guess I wasn't watching where I was going. [Yeah, she definitely wasn't.]

I'm okay, though! [Just a little bump on her head, but it doesn't hurt.] Are you okay? I'll be more careful!

[Apologies out of the way, it seems proper to introduce herself to her unfortunate victim.] My name's Vivi!