A traveling merchant appears to have lost his appetite for the trade while in Al Mamoon, causing his wife no end of worry.
This errand is available to complete after defeating Rusty's Nightmare.
To begin this errand, you need to talk to the man just above the entrance of the Hootique. He needs some enthusiasm, and we just happen to have some! (If you don't have the enthusiasm, talk to the vendor lady south of the town square and ask her for some of it.)
Talk to the man again and choose Give Heart when your Spell Menu comes up, then enthusiasm to restore him to normal.