填空题

A young man finished law school He opened a law office, but he had no clients. One day the young lawyer heard a knock at the door of his office. He was very happy. He picked up the telephone and pretended he was talking to a client. Then he said to the woman at the door, "come in. I’m busy talking to a client right now, but I’ll be with you in a minute."
The young lawyer hung up the phone and said to the woman, "Thank you for waking. What can I do for you"
"I don’t know." The woman said. "I’m from the telephone company. I came to connect your phone."

What did he say to the woman
I’m()a client now, but I’ll be with you in a minute.