You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please help me to book a flight ticket from AUS to IAD.

ASSISTANT: Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: My travel dates are Nov, 28 and Nov, 30.

ASSISTANT: Do you prefer any break in between journey?

USER: I need direct flight.

ASSISTANT: Are there any other specifications for you?

USER: No, thank you.

ASSISTANT: Can I have your good name?

USER: Cynthia Rodriguez here.

ASSISTANT: Sorry, no flights are available on your journey routes.

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

ASSISTANT: Thank you for opting us.