Best Served Cold is received after the completion of On The Loose, the version differs if either Orsino or Meredith was supported during the opening dialog of Act 3.
Letter 
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If Hawke supported Meredith...
Champion,
I require your presence in my office at Templar Hall as soon as possible. An urgent matter has arisen and given your recent actions, I believe you are the best one to deal with it.
Sincerely,
Knight-Commander Meredith
If Hawke supported Orsino...
Champion Hawke,
It took great courage the other day for you to speak openly against our knight-commander. You have my support in any actions you take. I hope I have yours as well, for there is a situation in the Circle I was hoping you could assist me with. Please meet me at the Gallows. Meredith has confined my mages to their cells and forbade me from traveling further than the Courtyard. I appreciate your service and discretion.
Sincerely,
First Enchanter Orsino
