You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Carol Harris here.

ASSISTANT: Ok.

USER: Owing to an emergency, I need a direct flight to reach ORD from AUS. Can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your planned journey dates?

USER: Sure, I have to go on 07/23 and intend to back on 07/25.

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

USER: No worries, thank you.

ASSISTANT: Thank you for opting us.