Don't tell the call spammers this or they'll train all their "agents" to start phone calls with "what's up, bro" or something they think is the stereotypical opposite of formal.
"Good morning, am i speaking with Mr. xxx" is how most formal stuff happens with me in the US.
I’d actually be entertained by this.
"Good morning, am i speaking with Mr. xxx" is how most formal stuff happens with me in the US.