@Louise123
Some guests are newbies - we all have to start somewhere. You will find that there are guest requesting to stay that actually do not have any previous reviews as it is their first attempt to give airbnb a go, thus investing in your future business.
If they are verified and sound like decent folk, there is no reason to be sceptical and you will prove to them that airbnb is the future way to book accomodation.
Being accomodtating, professional and vigilant are your golden rules 🙂