You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in booking my flight ticket from PHX to AUS?

ASSISTANT: May I know your trip dates?

USER: My scheduled dates will be Oct 31st to Nov 2nd.

ASSISTANT: Do you prefer any connections?

USER: I need a direct flight.

ASSISTANT: Any timings required?

USER: My depart time should be in the morning.

ASSISTANT: Do you prefer any other specifications?

USER: I prefer a economy class.

ASSISTANT: Sorry, no flights found on your route.

USER: Its ok, thank you.

ASSISTANT: Thank you.