If you are reading a fanfic where a character is on the phone and only one side of the conversation is shown, which of these formats do you prefer to see it in?

"Yes?"
"No, I'm not busy."
"It wasn't my idea."
"Now?"
"It'll take me about forty minutes to get back."
"Yes."
"Yes."
"I'll be there."
"See you."

OR

"Yes? No, I'm not busy. It wasn't my idea. Now? It'll take me about forty minutes to get back. Yes. Yes. I'll be there. See you."

I'm asking because I'm trying to write a one-sided phone conversation and I'm not sure what the right way to do it is. Most of the ones I see in fics show both sides of the conversation, which isn't what I want to do in this situation.