You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: May I know on which dates you are planning to start and return?

USER: My travel dates are 07 to 09 of June.

ASSISTANT: I need your preferred connection limit to check for a flight.

USER: I need a direct flight.

ASSISTANT: Ok, please let me know if you need anything else in the meanwhile I will check.

USER: I don't have any other specifications.

ASSISTANT: Sure, for that I need to know your name. Can you please provide me?

USER: I am Catherine King.

ASSISTANT: There are no flights available on your routes.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for choosing us.