Your profile write-up says nothing but "Lives in Phoenix". There are plenty of hosts who will accept a guest with no reviews, but showing that you understand that a host would want to know something about the person who is requesting to stay in their home would at least inspire a little confidence. You don't have write an autobiography, just state in one or two short paragraphs a bit about yourself. Just be as natural as possible-it can have a humorous element if that is your style, or just be factual. The main thing is to let a host get a sense of who you are and what sort of work and activities you do.
Airbnb should really make this sort of thing known to guests, but I guess they don't, or guests don't pay attention to it.
And, as Colleen said, make sure you communicate nicely with the host. Let them know what attracted you to their listing, address them by name, and mention why you are travelling to their area or what your general plans are while there. I've accepted several guests who had no reviews, but they sent me an informative message when requesting to book, and had a profile write-up.
Some hosts have had some pretty bad experiences with sketchy guests, or people who misrepresented their intentions and threw wild parties and trashed the place, so those hosts may indeed not be willing to accept guests with no reviews- don't take it personally.
@Maria13410