What are the type of interpersonal skills needed for customer service?

What are the type of interpersonal skills needed for customer service?
Interpersonal skills for Customer Service can be identified by using the KSA, knowledge, skills, and attitude approach:
Knowledge: Knowledge of product or service, refined handle on English (or the spoken language) grammar in both verbal and written form
Skills: Excellent communication and listening skills. Most effective customer service agents are excellent listeners. They typically listen in order to understand the customers communication style, emotional buying motivation, and need.
Attitude: Pleasant personality, outgoing, enjoys working with people and talking to people: a general people-person.
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