You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Please help me to book a direct flight to Orlando to treat an emergency case.

ASSISTANT: Sure, can you please share your airport codes?

USER: My source point is AUS and my destination point is MCO.

ASSISTANT: Let me know your travelling dates.

USER: Sure, I intend to start on 11/20 and my return date will be on 11/22.

ASSISTANT: May I know your name please?

USER: I am Jack hall.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: That's ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.