@Ted45... What will happen Ted is, the guests review will be held for 14 days, or until such time as you send a review if you have a change of heart (which I would strongly recommend)!
However if you choose not to review the guest then the guests review will become public on your page after 14 days and you will not be allowed to take any further part in the review process for that guest. Quite often the guest will have something to say that the host would like to respond to, and if you both submit reviews, you will be given the automatic rite to leave a public review response which will appear directly below your review on their page. If you do not write a review that public response will not be open to you and whatever the guest had to say will remain unchallenged.
The other thing to consider Ted, if you look at your 'Stats' and go to 'Standards' the last item in standards is your ' Review Rate' and every review you have given counts towards your overall pecentage. Every time you fail to leave a review your Review Rate will take a hit and that percentage will drop!
Ted, you can just leave a one liner..."Comunication was ok but would decline the offer to host again" if the hosting was a bit rough. That gets you on the board and satisfies the system.
Cheers....Rob