Guild Wars 2

I accidently deleted my quest to go to a dungeon. Is there anyway to get it back?
If I go over there will I be able to somehow pick it back up?
Please Help!

I’d like to help, but I don’t understand. How did you delete a quest?

Do you mean the letter you got? Unless you sentimentally want to keep it for the text, it’s absolutely not needed. The letter is only there to make sure you know you have a dungeon available. I’ll assume this one was for Ascalon Catacombs as you sound new to the process and that is the first one. That’s in NE Ashford Plains. Either get 4 friends along who are around your level or higher, or go to the entrance and ask for a slot, or check the lfg website.

You never need the letter to get in and do a dungeon, just to be the right level. Once you do the story version of the dungeon, that alt can thereafter start up explorable mode there.

You dont need the email to enter the dungeon. The email is just an advert letting you know the dungeon is available. You get it autmaticly when you meet the minimum requirement.

With or without the email you gust go to the location of the dungeon entrance and walk in to start it.

http://wiki.guildwars2.com/wiki/Dungeon#List_of_dungeons
This is a good list of all dungeons, the minimum levels and the locations of the entrances.