You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in booking the flight ticket from ORD to AUS?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: When did you scheduled to travel?

USER: My travel dates are June 15 and June 17.

ASSISTANT: Do you need any way station in your journey?

USER: I need a single connection flight.

ASSISTANT: Is there any specific time to travel?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: I prefer to travel in economy class.

ASSISTANT: May I know your good name please?

USER: Dennis Turner.

ASSISTANT: Sorry to inform you that, there are no flights available with your specifications.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.