To dream that you are a volunteer indicates that you anticipate the future and will begin a new phase in your life. This dream my also show your determination to do something. To dream that you leave something voluntarily, represents that you should review past situations and learn from them.
Dream dictionary: Volunteering dream meanings
…A sparrow or a hawk in a dream represents an ignorant and unjust ruler. Both command lesser controlling domains than the eagle. Holding a sparrow or a hawk in a dream means that one will capture a thief. If one sees himself producing a sparrow or a hawk out of his urethral canal, it means that he will bore a son who will possess courageous and frivolous character. Holding a sparrow in a dream also means choosing a community of elders and volunteering one’s services. (Also see Hawk)…
…or a calif in a dream also represents someone who establishes the laws of his religion and follows the example of God’s Prophet, upon whom be peace. Whatever he is wearing in the dream connotes one’s own state, or the growing or diminishing of his devotion. If one who is promised something sees the vice-regent or the calif in his dream, it means that his promise will be fulfilled, and his wishes will come true. Seeing him in a dream also means that someone from a different circle is backbiting him, or speaking of him without his consent, or that people are reporting him to the authorities, or that scholars are discussing him, or mentioning his work. A vice-regent or a calif in a dream also represents aloofness, seclusion, truthfulness, volunteering one’s services, commanding what is good and forbidding what is evil, developing one’s own certitude and faith, repentance, abstaining…