When you arrived at the pokemon center, Yellow was doing something with her fishing pole. When you approached, you saw that she attached a pokball to the end of the line and was testing how it felt to cast the line with such a heavy object attached. When she looked up from her work she saw you and started beaming.
Hey Ray! How're you this morning, I've already started training Pika and he's a really good pokemon! How're you today? in her usual rapid-fire speech.