Final answer:
If you suspect a customer has concealed a pair of shoes, approach the situation calmly and professionally. Provide friendly customer service while discreetly monitoring their behavior. If suspicions persist, inform a manager or security personnel.
Step-by-step explanation:
If I were fairly certain, but not sure that a customer had concealed a pair of shoes, I would approach the situation calmly and professionally. I would politely ask the customer if they need any assistance finding something or if there's anything else I can help with. If I still had suspicions, I would discreetly monitor their behavior while providing friendly customer service. If the customer's behavior continues to raise suspicions, I would inform a manager or security personnel and let them handle the situation. It's important to maintain professionalism and not accuse or confront the customer directly without concrete evidence.