Looking on the internet deeply has found these results:

I have reached office is the most popular phrase on the web.

I am reached office 15 results on the web	I have reached office 11,400 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Hello. You've reached the office of Dr Gina Toll. You have reached the offices of Dunder Mifflin Scranton. You've reached the office of Professor Carey. You've reached the offices of Byron... You have reached the offices of Ford Research. You've reached the offices of Psych. You've reached the office of Dr. Baldwin. You have reached the offices of the Alice Monroe Fund.	You have reached the offices of Dunder Mifflin Scranton. You have reached the office of Mr. E. Edward Grey. Woman (Recorded): You have reached the office of Dr. Judy lesterman and Dr. ira rothkiss. You have reached the office of Douglas Wilson and his assistant, Nancy Botwin. You have reached the offices of Ford Research. You have reached the offices of St Saviour's. You have reached the offices of the Alice Monroe Fund. You have reached the offices of Sentron, Inc.

I am reached office

15 results on the web

I have reached office

11,400 results on the web

More popular!

You have reached the offices of Dunder Mifflin Scranton.
You have reached the office of Mr. E. Edward Grey.
Woman (Recorded): You have reached the office of Dr. Judy lesterman and Dr. ira rothkiss.
You have reached the office of Douglas Wilson and his assistant, Nancy Botwin.
You have reached the offices of Ford Research.
You have reached the offices of St Saviour's.
You have reached the offices of the Alice Monroe Fund.
You have reached the offices of Sentron, Inc.