Where Is the Key?

Emma: Luis, where is the key?

Luis: Is it in the bag?

Emma: There is a pen in the bag. There is a phone and an umbrella in the bag.

Luis: Is it in the box?

Emma: There is nothing in the box.

Luis: Is it in the cup?

Emma: In the cup? There is tea in the cup.

Luis: Emma.

Emma: What?

Luis: The key is here. It is in the door.