Welcome to the forums, thanks for posting.
There is a main quest line, and a secondary quest line, The main line is unskippable, the secondary line can be skipped.
Click on the quest's icon (top left). If it's a secondary quest, there will be an 'Abort' button. If not, it's a main quest and you'll just have to complete it.
Hope this answers your question. In future, please post your questions in the 'Questions/FAQ' section, that's what it's there for.
While you're here, I suggest getting acquainted with our lovely Guides section, where you'll find lots of helpful information.
Thanks for playing Forge of Empires.
Edit: Another tip, before posting, you should perform a search (top-right), In this case, a search for "Fire in the Hall" would have found you a thread that explains as this is a quest from Ragu Silvertongue, it's in the main line and unskippable.