I want you to go to the post office. ✬

If it isn't out of your way, please take this letter to the post office. ✬

I'm just going to drop by the post office. ✬

Excuse me, but would you please tell me the way to the post office? ✬

There is a post office close by. ✬

You'll take this to the post office, won't you? ✬

Is there a post office near here? ✬

Is there a post office around here? ✬

Please tell me how to get to the post office from here. ✬

How can I get to the nearest post office? ✬