I don't think you should try and validate her feelings for not getting the job. Also you don't and she dosent know if she hasnt gotten it yet.
Validation is more for when she tells you she feels and certain way, you don't try to tell her she feels opposite. You validate that her feelings are hers and she has a right to feel that way. If you want to tell her uplifting words, then I would wait until next time she calls and if she brings it up and tell you she hasn't gotten the job, you could say something like, "You are a hardworking woman and you will get a job soon, I'm sorry this one didnt work out for you". Put the positive up front in your comment. After you make that comment, let her talk and tell you what she needs to tell you. Don't keep saying sorry or glorifying her.
My thoughts.
M:37 W:37 T:11 M:10 S17, S13, S10, S4 BD:06/28/17 OM confirmed 07/20/17 Recon the M 10/29/17 Working hard:2gether
Onward and forward
This process is not a sprint it's a marathon! Patience, Patience, Patience.