Usage of comma

[Ferdie11]

Rebecca Smith requested a copy of that expense report, so I had the courier take one over to her last week.

Can you please tell/explain to me what rule (comma) is used in the sentence above.

Thanks in advance.

[bhaisahab]

Rebecca Smith requested a copy of that expense report, so I had the courier take one over to her last week.

Can you please tell/explain to me what rule (comma) is used in the sentence above.

Thanks in advance.

The comma in the above sentence is a natural pause, try saying the sentence without pausing for breath after 'report'. If you put it anywhere else, it breaks up the sentence in an unnatural way.

[Ferdie11]

The comma in the above sentence is a natural pause, try saying the sentence without pausing for breath after 'report'. If you put it anywhere else, it breaks up the sentence in an unnatural way.

So there is no particular rule applied to it.

Thanks a lot.