Remove one person form family appointment - B1/B2 India


My family (3 members) has secured a visitor visa appointment in India and one of the applicants is unable to make to the interview (conflict with a non USA work visa interview). Is there a process to remove that individual applicant while still retaining the same appointment date for the other 2 applicants? I can’t seem to find any information regarding this and hoping someone with experience can help me.