You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I would like to book a ticket from AUS to IAD, can you please help me with that?

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

USER: The travel dates are from 06/23 to 06/25.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: Rebecca Anderson here.

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

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for opting us.