Look at the local rules of court to see if it says anything about continuing case management.
If you cannot continue it, you would just tell the court the same thing that you posted here. The court would set another case management conference so that all the parties could attend. You probably can appear by telephone if you did not want to go to the courthouse. Check the local rules about doing so, or call the clerk.
In some courts, it is possible to continue a Case Management Conference if all of the parties sign and submit a Stipulation and Order to Continue. Otherwise, the court prefers to hold the initial CMC, and then continue it after hearing from the parties as to how much longer is needed before the parties can discuss trial setting and mediation.
Frank W. Chen has been licensed to practice law in California since 1988. The information presented here is general in nature and is not intended, nor should be construed, as legal advice for a particular case. This Avvo.com posting does not create any attorney-client relationship with the author. For specific advice about your particular situation, please consult with your own attorney.
If the other parties have not yet appeared, then you should probably show up at the scheduled CMC, explain this to the court, and they will most likely continue the CMC to a later date.