You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Do you need any help from my side?

USER: Can you help me to book a direct flight from AUS to SEA?

ASSISTANT: Sure, I can help you and can you please mention your travel dates to book a ticket?

USER: My travelling dates are 23 July and 25 July.

ASSISTANT: Is there any time preference that you have?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Do you need a normal cost or low cost flight?

USER: I prefer to fly in normal cost.

ASSISTANT: May I know your name for booking the ticket if there is any flight found?

USER: I am Susan Harris.

ASSISTANT: Please allow me a moment to check for the flight.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting, as per your intent there is no flight obtained on your journey dates to book a ticket.

USER: It's ok, not a problem, thank you.

ASSISTANT: You are most welcome and next time we can serve you better. Thank you for reaching us.