You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I would like to visit Magic Kingdom with my family at Orlando, could you please help me in booking a ticket?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source and destination airport codes are IAH and MCO.

ASSISTANT: Can you please share your planned dates to travel?

USER: I would like to start on 08/23 and return on 08/25.

ASSISTANT: May I know your good name please?

USER: My name is Lisa Anderson.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Most welcome.