I'm wondering if you could give us a chance to have interview with you.
Would it be possible to have an opportunity to interview with you?
I would be very much grateful if you could accept our request to have an interview with you.
丁寧に何かを依頼する場合、
I'm wondering if you could...
Would it be possible to ...?
I/We would be very much grateful if you could...
などの表現は非常に丁寧な依頼の表現となり、受けてもらえやすくなると思います。