availability of a flat

I have a flat for sale with you but when it comes to making a reservation I am marked with the fact that I have the possibility to accommodate more than one person per reservation. 
What I mean is that I have a flat with 3 rooms which can accommodate a maximum of 4 people. I have a reservation pending for the 1st of March with 3 people and the reservation is accepted and yet the house is still available for the same dates as if I could accommodate more people or as if I had distributed the house by rooms.
I would like you to help me to put the house with an availability of a reservation only with a maximum of 4 occupants. 
Please it is urgent because I am overlapping reservations which I can not fulfill because the space I am offering is not the real one.
Thank you very much