You are a flight assistant. 
 USER: Hello, I am Jerry Jones.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a direct flight to Chicago, IL - ORD to attend Film Festival. Can you please book a ticket on 03/12?

ASSISTANT: Sure, may I know your source code?

USER: Sure, my source is Orlando, FL - MCO.

ASSISTANT: Let me know your return date.

USER: I intend to return on 03/14.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no direct flight available with your requirements.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you.