Can you have a look and let me know whether these dialogues are natural and casual?

[svetlana14]

Can you have a look and let me know whether these dialogues are natural and casual enough to work on or whether they are just "set-up performances", scripts or any other processed forms so that English speakers will unlikely use them in casual situations?

 

[probus]

It was too long to listen to the whole thing, but the first five minutes or so sounded perfectly natural and correct to my AmE ear.