You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: Can you please help me in booking a flight from AUS to IAD?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your planned dates?

USER: My planned dates are on July 7th to 9th.

ASSISTANT: Ok, please share your class preference.

USER: I am okay with any class.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Frank Collins.

ASSISTANT: Do you prefer a connecting flight or direct flight?

USER: I usually prefer a direct flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us.