Hello [name of hiring manager],
I would like to take a moment and thank you for this call of the interview but after much self-reflection and introspection, I would like to pull my application back. I am yet in the process of completing my degree and hence I lack the experience you are looking for in a person. I still dont hold the degree and it will be another couple of months for me to be market-ready or job-ready.
While it was a great opportunity for me to get in touch with you and your process of recruitment is extremely applicant friendly and I would definitely recommend my seniors to apply in your organization. Though it will still take me a semester to get my degree it would be my pleasure to get in touch once I have the required qualification so I would save your number for any future references.
[your full name]