If you actually want to be able to RESPOND to a question, you'll want the "Show Choices" command somewhere in there.

<>Message: "King: Hello BlueCube. Why have you asked to see me?"
<>Change Face Graphics: hero1, 1, left
<>Show Choices: I'm here to kill you/I'm here to give you a gift
: |I'm here to kill you| Handler
___<>Message: "BlueCube: I'm here to stop your reign of terror!"
___<>Change Face Graphics: Erase
___<>Message: "King: IS THAT SO?"
___<>(Rest of event)
___<>
: |I'm here to give you a gift| Handler
___<>Message: "BlueCube: I'm here to give you a gift, your majesty!"
___<>Change Face Graphics: Erase
___<>Message: "King: Why thank you! I've never heard of this brand of wine before! POI-SON, sounds Japanese!"
___<>(Rest of event)
___<>