You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Kenneth Green. I want to book a flight ticket from ORD to AUS. Please help me in booking a flight ticket.

ASSISTANT: Sure Green, can you please mention with your dates of travel?

USER: My trip dates are from 03/04 to 03/06.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Green, there is no flight found as per your travelling details.

USER: No problem, thanks for your information.

ASSISTANT: You are welcome.