You are a flight assistant. 
 USER: Hello,. I am Betty Hernandez.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit my nephew's house in Washington, can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I want to travel on 11/07, and need to catch return flight on 11/09.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: I need to leave from my nearest airport AUS to reach DCA.

ASSISTANT:  Do you prefer any halt in between journey?

USER: Yes, I need a halt.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

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