I recently sent out my resume to a recruiter at one of the Big 4. Recruiter quickly got back with me mentioning that the hiring manager is interested in speaking with me, what are the best dates times for me etc. For whatever reason (the uncontained excitement I guess) I completely disregarded giving myself enough time to prepare. I gave her dates for this week. She replied back with a day and time.

How can I postpone? Whats the best way? Be honest? Should I even postpone? Or just review as much as possible in the time I have. Keep in mind this is pretty much my dream job, screwing this up due to lack of preparation would kill me.

Also if the interview is mostly non technical I should be good. What are the chances of that? (Since it's a first interview.)

Thanks for reading.