Hi
I have to go to the computer to see the reviews
If no reviews on the computer then they have none. If they have been on Airbnb for a while I simply just ask "gee I see you have been with Airbnb for a while but have not reviews" I normaly get a nice answer. One lady had joined and had a trip canceld by host just before she was due and she was so upset it ruined her holiday and she did not trust Airbnb. I made a massive effort for her and she now has a little trust back so that was nice she really enjoyed her stay
I do not have a propblem with new people either. If they communite well when they book I like to let them know "Oh you will love been part of the Airbnb communitee once you get some reviews you will be off and running and staying in some great places" I may also have my caretaker drop in and "see if they are ok and comfy" and just drop some suble hints like "Oh Sue is so lovley she loves been a host and looking after her guests and when you get a good review you will go on and love Airbnb" this often helps I think make new people with no reviews feel comfy and I find they are great guests and do the right thing. We are all new at sometime and we all had one guest trust us when our listing were new and we had no reviews
I hope this helps
Sue