IB Orals regardless of the language are OFFICIAL IB EXAMS. You cannot miss the time assigned.  In case of extenuating circumstances  e.g. due to illness, you parents need to inform the US office and Nurse Mamen and a doctors note will be required for a reschedule. Take note of the time and location of your orals. You should not have another exam on the day of your oral. Your paper work should be uploaded to Managebac a week before the orals as required by the IB.