There you go.

You say "There you go" when you're giving or handing a person something. More generally, you use it when you're doing something for another person. For example, say "There you go" when:

• you stand up to let someone sit down
• you've finished tying someone's necktie for them
• you clear a space on the kitchen counter for someone to set a hot dish on

You can also say "here you go" in the same way. While there are no absolute rules for when to use one or the other, I would use "here you go" if I brought something to them from far away, and "there you go" if I'm sitting in place and handing them the object.