You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit Houston, will you help me in booking the flight ticket from AUS to IAH?

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are Feb 29 and Mar 02.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Let me know your class preference?

USER: I prefer economy class.

ASSISTANT: Any other requirements to be met?

USER: Make sure that my return time must be in afternoon time.

ASSISTANT: May I know your name?

USER: Myself Katherine Adams.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.