Your response should be relevant and direct to the point. The interviewer is asking for experiences applicable to the job you're applying to. Collect your thoughts before answering to avoid mentioning unnecessary information.

Here is an interview answer example: "I have a total of 3 years experience dealing with customers. I worked as a receptionist in a clinic for 2 years setting up appointments and maintaining patient records. I was also employed at an inbound call center for a year, my job was to set up customer accounts and verify information. Both jobs have honed my communication and organization skills, as well as my patience and attentiveness to customers."