If interviewer called youat a once, and you were not ready to interview, you may say：
选项：

A:I am sorry. I didn’t get your name. Could you repeatit, please? ;
B:I’m glad you called, but I have the class at 2 p.m.Could we arrange another time to speak?;
C:I am sorry we seem to have a bad connection. Could youspeak a little louder? ;
D:Could you please slow down just a little bit?