USPTO air forms are available here.
This is 21st century Government is keen for the type. You can fill in a very fast and simple form, offering his examiner interview date and time, digitally sign, and you’re done. Beautiful!
If you have questions or need assistance with the United States Patent and Trademark Office practice of air format or in USPTO interview, you may be contacted to interview experts or send an email to ExaminerInterviewPractice@USPTO.GOV.