Help with quest chain

Hello, a failure has happened to me with this mission, Reborn From The Ashes, I completed it I went to Ogrimar but I did not notice that it was delivered there and I returned to Stormwind then I gave him to abandon the mission with the hope that Alexstrasza would show me the mission again and it was not like that, I'm still waiting to show it to me.
how do I get the chain of missions from part four

Part Four
1) Reborn From The Ashes - talk to King Varian Wrynn in Stormwind City
2) Fate, Up Against Your Will - speak to the Warchief of the Horde, Thrall
3) A Royal Coup return to King Wrynn
4) The Killing Time - report to Broll Bearmantle
5) The Battle For The Undercity