You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to make a journey from AUS to DCA. Can you please help me with the booking?

ASSISTANT: May I know your travel dates?

USER: My journey dates are June 03 to 05.

ASSISTANT: Do you prefer connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I am comfortable to travel in economy class.

ASSISTANT: May I know your good name?

USER: I am Karen Phillips.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.