In a large pot, combine the broth, onion, carrots, parsnips, salt, and pepper and bring to a simmer. Add the chicken breasts to the pot and simmer until jfor about 20 minutes, until cooked. Remove the chicken and let rest. When cool enough to handle, remove skin and bones and chop or shred intobite-size pieces. While chicken is cooling, bring the soup back to a simmer and stir the noodles into the soup. Simmer until the vegetables are tender and the noodles are done, about 5 minutes. Return the chicken pieces to the pot and then stir in the dill and the parsley.