You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Robert Allen.

ASSISTANT: How can I help you at this moment?

USER: I am looking to book a flight ticket with single connection. Can you help me for booking a flight ticket from IAD to AUS?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Could you please provide your journey dates to proceed further?

USER: My travelling dates are 11/07 and 11/09.

ASSISTANT: Give me a moment please.

USER: I have changed my opinion, please search a direct flight for my journey.

ASSISTANT: Robert Allen, there are no flight services available with your preference of 0 connection limit on this route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.