Make an appointment before calling a person in the office

My office telephone rang. Someone asked to speak to Mr. Tan. He had a question to ask why interest is not payable on CPF annuity that is not terminated.

TKL - "I do not take office calls without prior arrangement. I am now busy with my work. If you have a question, send an email to kinlian@gmail.com and enclose the relevant documents."

Caller - OK.