You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Joshua Young.

ASSISTANT: How can I help you out?

USER: I am looking to book a flight with single connection. Can you help me for booking a flight ticket from JFK to AUS?

ASSISTANT: Sure, we are happy to help you. Can you please help me with your travelling dates?

USER: My travelling dates are Jan 04 and Jan 06.

ASSISTANT: Do you have any stopover in between journey?

USER: I need a single connecting flight.

ASSISTANT: Is there any specific arrival and depart time for you?

USER: My departure time is afternoon and my return time is evening.

ASSISTANT: Ok, kindly mention your airline preference.

USER: Any airline is fine for me.

ASSISTANT: May I know your class preference for this trip?

USER: No class preferences.

ASSISTANT: Thanks for providing details, no flights are available on your preferable dates of travel.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: Welcome.