You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you please search a flight ticket from DCA to AUS?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: My travelling dates are June 16 and June 18.

ASSISTANT: Do you have any connection limit?

USER: I need single connection flight.

ASSISTANT: May I know your airline preference?

USER: No, preference.

ASSISTANT: Do you have any other requirements?

USER: I prefer my return ticket at evening time.

ASSISTANT: Ok, please share your name to proceed further.

USER: Myself Ruth Harris.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.