move or lerp slowly game object to other game object's position by single click on UI Button not on multiple clicks?

hey man i have a problem please solve my problem " i have a button in my scene a main camera and am empty game object now what i want that whenever i click on that button my camera will slowly lerp to that empty game objects position. My camera is lerping to that positition which is fine but the problem is that i have to click multiple times on that button until my camera reached its position so is there a way to move my camera to game objects position on single click on button please help me thanks waiting