How do I approach Clint?

Hint 1 of 7:

Did you find him?  If not, he's now where Coit Tower used to be.

Hint 2 of 7:

Go to the Golden Gate Hotel, and turn left.  You can get through the fence
and end up in Clint's Cocoa Cabana.

Hint 3 of 7:

Start with conversation opener C.  The lines after that don't matter very
much, but flattery can't hurt you either.

Hint 4 of 7:

Show him the untranslated letter.

Hint 5 of 7:

His language skills don't seem to be that good after all.

Hint 6 of 7:

Now you can ask about the new topics.

Hint 7 of 7:

Ask about Emily, Gus Leach, and Gus Leach's key.