"Hiya Dave!" said a voice at the end of the hallway. Dave looked at the source of the noise, and saw a 7-year-old dashing down the hallway, wearing a pink 'My Little Pony' T-shirt. Dave was trying to figure out who she was, but was interrupted by her hug. It became obvious that she was Elizabeth, his fiance.
"Hey Lisa. I didn't expect you here today..."
"I told you, like, a week ago. Amy's birthday party's today, and my Mommy said she'd drive us."
"Oh, sorry. I have to grab some stuff out of my office, I'll be out in a minute.:
"Okay, remember to change."
Dave went back into his office, and quickly located his magic pen and scrawled onto one of the forms on his desk:
'I know what my new life self knows and keep my old memories'
It was hardly legible, but it nevertheless took effect. Amy was Elizabeth's friend from work, her party's at Chuck-e-Cheese's, and his change of clothes are in the Transformers bookbag behind his desk.
Dave changed into his casual clothes, and returned to Elizabeth.
"Come on, let's go. My Mommy's in the car outside.