percakapan untuk 2 orang yang berisi giving and asking information dengan past perfect tense

Aswer:
_______
Elsa:"had you known the way to get to post office from here?

Helen:"I hadn't known it yet. Could you tell me,Please?

Elsa:" had you gone there before?

Helen:"No,i hadn't.

Elsa:"Ok,From here, you had to walk along,if you had walked along, then turn right in front of The hospital, you could find the post office was next to the book store.

Helen;"Ok,Thank you for your explanation.

Elsa:"Didn't mention it.

*Thanks*