What is the best way to improve your self how to convince customer/people to believe you.?

firstly knowing the customer query and trying to resolve his query by escalating as much as possible.

that makes the customer to get belief on us...because in this service customer is first and our convincing power decided how we interact with him...

# Behavioral part is the one main think to get customer's softness or satisfaction.

# Service quality is the another main think to provide best customer experience.