Use the following answers to the conversations to unlock the best ending for that person:

Zeke Sanders
Empathize, Empathize, Empathize, Empathize.
Zeke will release the hostage and flee. If you let Zeke leave but make a mistake in the rest of the conversation, he will still go but the hostage will die.

Wayne Haas
Absolve, Absolve, Absolve/Plead, Crush.
This givesyou unrestricted access to the non-restricted areas of the Detroit police station. Note: This unlocks the "Desk Job" trophy.

David Sarif
Refocus, Refocus, Refocus, Defend.
David will give you emails and records about Adam's past and the security loophole. Note: This unlocks the "Yes Boss" trophy.

Tong Si Hung
Pinpoint, Advise, Pinpoint.
Adam can go downstairs to meet with the Triad leader that owns The Hive. Note: This unlocks the "Darker Shades" trophy.

Bill Taggart
Confront, Discredit, Confront, Discredit.
Bill Taggart gives you the location of Dr. Isaias Sandoval. Note: This unlocks the "Throwdown" trophy.

Doctor Isaias Sandoval
Tough Love, Empathize, Empathize.
This prevents Isaias Sandoval from killing themself. Note: This unlocks the "Last Straw" trophy.

Hugh Darrow
Extrapolate, Extrapolate, Appeal, Extrapolate/Appeal.
Hugh Darrow deactivates the security system and you will get the code to shut down the Hyron system. Note: This unlocks the "Final Countdown" trophy.