You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I help you?

USER: I need a direct flight to travel from WA - SEA. Can you book me a flight ticket?

ASSISTANT: Sure, Let me know the travelling dates?

USER: My travelling dates are from 12/29 to 12/31.

ASSISTANT: May I know the destination code?

USER: My destination is NC - CLT.

ASSISTANT: Ok, Wait a while. Thanks for waiting. There is no flight available with your data.

USER: I am Andrew Rodriguez. Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for reaching us.