After having received Arturo's number from their joint efforts the other night, Derek reaches out to him to continue their appointed task.
Should Arturo answer, or should the line take him to a voice message Derek says, "Hello, Mr. Garcia. It's Derek...Mitnick. I managed to get some potential help for the next stage of our assignment. If you wanted to bring someone else along, you're welcome to it. Shall we meet at the Fuego again or would you like to discuss things in anticipation of the private party we'll be crashing?"