I think my orchid flower plant is dying what do I do?

where do you have the orchid?..is it near a vent that may be blowing cold air on the blooms or an A/C unit, or possibly in an area where the temperature is getting too hot. Typically blooms should last quite awhile on most orchids unless they are too cold or too hot. I would try running room temperature water through the pot in a sink and let the humidity build up around the plant, that will help the roots absorb more moisture which in turn will help the plant.