"Hey, Cal..! Um, this is Zeph. Look, I know it might be short notice, but we're having a party tonight, and... well, it'd be awesome if you could come. I know it's not exactly just the two of us, but it's a start, right? Anyway, if you're not busy, it'd be great to see you there. *click*"
[Right after the first one] "Me again, forgot to say it's at Zeke's and Spencer's place, [address]. Keep rockin', buddy! *click*"