Mayor Silver Hoof:
“Ah...good, you’re here. You see...we have a problem. A big one. The Wellworks have been sabotaged - somepony broke into the purification chamber and stole the access panel for the talisman that powers the system. We only have the one talisman and the one access panel, and the technology is too complicated for a go-around system. Simply put...we’re running out of drinking water. Fast. Now, it turns out that the bastards are holding it for ransom, but we can’t pay their price. If we can’t pay, we don’t get the port back. If we don’t get the port back, we run out of water. If we run out of water...we die. We need your help. We’re forming a posse in the town center, out by the large fountain. We need you to replace the missing part, either by taking back the original from the thieves, or by some miracle of Luna, find a new one. Will you help us?"
Mayor Silver Hoof:
"Excellent! Like I said, meet up with the leader of our little effort down by the fountain. When you exit my office, just turn and take the street down the left. Fountain's right there, you can't miss it. Make sure you have all your things before you go, time is of the essence, and the posse isn't going to wait."
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(To clarify: Get to the Fountain with your things. We'll take it from there.)