adviser
agent
assistance
business
businessman
call
center
cheerful
client
communication
connection
consultant
contact
conversation
corporate
customer
desk
employee
employment
formal
friendly
happy
headphone
headset
help
helpline
job
listening
male
man
microphone
office
operator
person
phone
portrait
professional
public
receptionist
sale
service
smile
support
talking
technology
telemarketing
telephone
trade
unshaven
worker