Possible:

Find Face Maker

Find Score

Find Nausea Powder

Find Drink

Place Smoke
Generators

Assume Ambassador
Aid's ID

Access Restricted
Area

Impossible:

Same
                       Recover NOC List: Embassy
                                   Function

                   Place a smoke generator in the hall to the right, and
                   another in the vent nearest to the couple in the
                   entryway. Walk to the left and place the third in the
                   vent next to the chairs. From here, head to the piano
                   player. To his right is a vent, put a generator in it.
                   Go to the bar & talk to the tender for the drink &
                   powder. To the right of the bar is another vent.
                   Place a Generator in it and return to the hallways.

                   Talk to the people next to the painting, then talk to
                   them again when they sit down. Lure Scotfield into
                   the bathroom. Wait until she comes, then kill her.
                   Go to the couple again and pick up the scroll under
                   the man's seat. Go back to the start of the level and
                   talk to the woman until the man leaves. She'll give
                   you the Face Maker.

                   Go to the piano player and give him the Score. The
                   Ambassador's Aide will come. Hand him the
                   poisoned drink and follow him to the bathroom.
                   Punch him and change your identity. Then go
                   upstairs and take a left. Put the last smoke generator
                   in the vent. Head to the other end of the hall and talk
                   to the guard to access the restricted area.

                   Tips: Don't let the guards see you when placing the
                   smoke generators. Try to keep your distance from
                   Scotfield.