The post office is very busy and a customer approaches to ask a quick question about whether their package has been delivered. You are currently helping another customer. What should you do?

Brief acknowledgment ('I'll be right with you') manages the second customer's expectation, communicates that they have been seen, and prevents them from feeling ignored — all while maintaining proper focus on the current transaction. Ignoring the new customer may make them feel dismissed and escalate to frustration. Abandoning the current customer is rude and inefficient. The brief acknowledgment is a standard customer service technique that costs nothing.