Do you want to exchange numbers?

Teacher Oh Hye Won picked me up and introduced me to Professor Jo In Seo.  She’s the real teacher to me.  I went to him when Professor In Seo was staying in the U. S. and I followed him to this school.  I don’t see her as often now, but the pointers she gives me sometimes are really helpful.  Do you want to exchange numbers?

No.

Sorry.  Professor!