おうたい応対outai
1.

The act of interacting with someone in a considerate manner, listening attentively to their needs, and responding appropriately based on the conversation.

2.

The process of conducting a dialogue or exchange, particularly in formal situations such as customer service or phone communications, where the focus is on effective communication and fulfilling the expectations of the other party.

Example:

間髪を入れず、迅速かつ的確な応対、畏れ入ります。