Teaching your dog to come when called (Recall) is an important skill and it needs to be proofed in a variety of contexts, levels of distraction, and locations. And it needs to be practiced frequently so your dog’s Recall remains a strong behaviour with a long history of positive reinforcement.
Here is a fun training video teaching a Recall. It does a very good job of breaking down the skill into small pieces and shows the progression of the dog’s skills in varying levels of distractions. NOTE: you do not need a clicker (as shown in the video); you can use a marker word like “Yes!” if you like. And you do not need to use the same word as the verbal cue.