This quest  is called 'Reward for a Job Well Done',
for Adventurers levels 15 to 60.
Lady Undya is the mistress in charge of this quest.
I have just received the annual crime reports, and I am happy to announce
that the totals have decreased! Of course, I never had any doubt they
would. I am planning on having a celebration soon, however I would like to
do something special for the guards first. I have already gathered together
these pouches of gold, as a wage bonus, however I think something more is in
order. After all, these guards have been employed nearly as long as I have
been Quest Master. I would like you to buy four different types of flowers
and a nice bottle of white wine and then deliver it to the Captain of the
Guard. After he is finished his outpouring of gratitude, please ask him for
a list of the other guards. Then buy each of the guards on the list a
bottle of plum wine and deliver it to them. Finally, return to me as I
would love to hear all about their reactions.
Upon successful completion of this quest you can receive:
*Up to 26 quest points, 3 practice points, 10,000 experience points,
0 build points, 0 piety, and 5,000 gold pieces.
You have 147 Alyrian minutes remaining to complete this quest.
Reward for a Job Well Done consists of:
Phase 1: *Locate and deliver a white lily to the Captain of the Xaventry Guard.
Phase 2: *Locate and deliver a pink carnation to the Captain of the Xaventry Guard.
Phase 3: *Locate and deliver a purple orchid to the Captain of the Xaventry Guard.
Phase 4: *Locate and deliver a beautiful daffodil to the Captain of the Xaventry Guard.
Phase 5: Locate and deliver a glass of white wine to the Captain of the Xaventry Guard.
Phase 6: Locate and deliver a bottle of plum wine to a Vandyne guard.
Phase 7: Locate and deliver a bottle of plum wine to a burly guard.
Phase 8: Locate and deliver a bottle of plum wine to a stronghold guard.
Phase 9: Locate and deliver a bottle of plum wine to a bored prison guard.
Phase 5. I'm reasonably certain that the item 'a glass of white wine' doesn't exist. There are lots of glasses of drinks and there is a bottle of white wine, but I've never seen a glass of white wine.
If anyone can find one and prove me wrong, I'll be just as satisfied as if the quest gets 'fixed'.