I have read the oracle documentation for 12c on saving response files from dbca and have found this:
Starting with Oracle Database 11g Release 2 (11.2), you can save all the installation steps into a response file during installation. You can click the Save Response File button on the Summary page to do this. Later, this file can be used for a silent installation.
However, I am at the summary page in DBCA and do not see an option to record a response file. I poked around other pages in DBCA and could not find it either. Does anyone have any information on how to record a reponse file for 12c DBCA?