There's a common theme in movies

since you can only hear one side of a phone conversation

of a character repeating a lot of what the other person said for the audience's benefit. I've seen some example conversations written out showing both sides that show how ludicrous such a conversation would have to be.

https://tvtropes.org/pmwiki/pmwiki.php/Main/RepeatingSoTheAudienceCanHear

https://www.youtube.com/watch?v=VEB-OoUrNuk

phone rings, main character picks it up

"I don't know who you are. I don't know what you want. If you are looking for ransom, I can tell you I don't have money. But what I do have are a very particular set of skills, skills I have acquired over a very long career. Skills that make me a nightmare for people like you. If you let my daughter go now, that'll be the end of it. I will not look for you, I will not pursue you. But if you don't, I will look for you, I will find you, and I will kill you." - MC

"Uhh, I'm just calling about your extended car warranty..." - poor bastard

My mother's husband does that shit though. Never says goodbye, just hangs up the phone and I'm left annoyed again.