Hi this.to.firstName,

My name is this.fullName and I was just hired as job.title. My manager, manager.full.name, suggested I reach out to you to learn more about area.of.discussion.

Are you available to meet for a few minutes this/next week to bring me up to speed on what you're working on?

Even 20 minutes of your time would be much appreciated. Thanks so much!

Yours,
this.firstName