Keigo for asking for a name again: もう一度お名前をお伺いできますか [Keigo Dojo] - Easy Japanese for Work

Taking the time to confirm the name of someone by asking them to repeat it, goes a long way in showing them respect and minimizes confusion.

Keigo Dojo provides instruction on how to use keigo [敬語] (Japanese honorifics), an essential aspect to using the Japanese language with respect and civility.