Easy Japanese for Work S01 E13 Answering phone calls for others

This episode is about answering phone calls for others. Nguyen Truong Giang, from Vietnam, is an IT engineer who works at a marketing firm. Giang-san studied Japanese and programming in university. He moved to Japan in 2015 and now serves as a link between the Vietnam branch of his company and the Japanese headquarters. Giang-san's Japanese is good, but he still needs experience with phone manners. In a telephone roleplay challenge, what will he do when a call comes in for a coworker who is busy on another line?