If a customer begins to take up your time (e. g., making small talk) while others are waiting for service, you should:

You should ask the customer if their needs have already been met, if the answer is yes, do you wish the customer a good day, excuse yourself and leave. If the answer is no, you ask how you can help him and then you excuse yourself and withdraw to help other customers.

Explanation:

Customer service is all the support you offer your customers, whether before, during or after purchase, and that helps them to have an excellent experience with your company. The definition of customer service goes far beyond just giving answers: the concept of service is a very important part of what your brand means to customers, becoming a critical factor for the success of your business. That is why you should not serve customers in a rude manner, with stress and prices, but you should serve them with patience and cordiality so that they felt special inside your store.

For this reason, if a customer starts to occupy his time (for example, talking a little) while others wait for the service, you should ask the customer if his needs have already been met, if the answer is yes, you should wish a good day to the customer, ask permission and leave. If the answer is no, you should ask how you can help him and after that he helps you to withdraw politely.