You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How shall I help you?

USER: On 11/11 my mother birthday so, I have planned to celebrate her birthday in Charlotte, NC - CLT. Please help me in booking flight ticket?

ASSISTANT: Sure. May I know your departure airport code?

USER: Orlando, FL - MCO is my departure airport.

ASSISTANT: Please provide your return date.

USER: 11/13 is my return date.

ASSISTANT: Any specifications?

USER: Yes, price do not exceed 200. And I need a lay by in between.

ASSISTANT: Please specify your name.

USER: Katherine Taylor.

ASSISTANT: I'm sorry, no flight available with your requirement.

USER: That's ok, not a problem.

ASSISTANT: Thanks.

USER: Thanks for the response.