You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Please help me in booking flight ticket from AUS to IAH.

ASSISTANT: Sure, May I know the journey dates?

USER: My trip dates are June 16 to June 18.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I want to fly in economy class.

ASSISTANT: May I know your name?

USER: Myself James Parker.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.