You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Sandra Hernandez here. I am looking for a direct flight from AUS to DEN. Could you book my ticket?

ASSISTANT: Sure, can you please mention your trip dates for booking purpose?

USER: My trip dates are 09/07 and 09/09.

ASSISTANT: Ok, please be on hold, let me check the flight availability.

USER: Sure.

ASSISTANT: We found a flight with 1 connection limit and airfare is 200. Shall I proceed for booking?

USER: I need a direct flight.

ASSISTANT: Ok, wait for a while, let me check out.

USER: Ok.

ASSISTANT: Sorry, there is no direct flight on this route.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.