You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me in booking a flight ticket from AUS to DCA?

ASSISTANT: Sure, please share your journey dates?

USER: I want to travel on 05/10, and return on 05/12.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Any other requirements to be met?

USER: I want to depart in the evening time.

ASSISTANT: May I know your name?

USER: I am Emma Walker.

ASSISTANT: Do you have any connection limit?

USER: I need a break in my journey.

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

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.