You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Could you please check the flight availability in economy class?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: I have planned to travel on Dec 20 and Dec 22.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any class preference?

USER: I already mentioned above.

ASSISTANT: May I know your good name please?

USER: My name is Joseph Davis.

ASSISTANT: Can you please share your airport codes?

USER: I am heading to AUS from ORD.

ASSISTANT: Do you have any particular time for departing and returning?

USER: No.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.