Ask a stranger to flirt with her

It's Saturday night and you're out partying. You caught her checking out a guy a few times. He's totally her type and it looks like he checked her out a couple of times. This guy is heading for the bar and so are you. You get next to him and try to get his attention:

"I'd like you to flirt with my girlfriend!" - you tell him right off the bat

"Sorry, do I know you?!"

"No, but my girlfriend is into you, I saw you checked her out a couple of times and I'd like to give her the opportunity to flirt with a new guy."

"So... what's the catch?"

"No catch. I pretend I have a call from work, go outside and you just go and flirt with my girlfriend"

"Is she into this too?"

"Not really, she doesn't know I'm ok with this or that I'm talking to you about this"

"Ok. Go, don't let that important call go to the voicemail" - said the stranger and winked at you.