I order takeouts from these apps a lot e.g. Doordash, Skipthedishes, Uber Eats.
I wonder what is the most natural/idiomatic way to respond to the delivery guy on the phone to confirm his identity when he arrives?
Is this doordash?
are you from doordash?
do you work for doordash?
And what if I want to confirm he has arrived outside of my apartment, what should I say
Did/have you arrived?
Are you outside of my building?
Then I would like to ask him to use the buzzer, a device which connects to my phone so I can let him in and use the elevator to my floor. He just needs to type in my buzzer code into the device. What are some of the possible ways that I can make my point across?
And I know maybe all of the example sentences I provided above work, and I can just get by with them, but I am really curious about how a native speaker would phrase things in this kind of situation. Also are there any good resources that have these types of modern and close to life conversations so that I can learn from?