You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I respond to your request?

USER: Can you please book a flight ticket from PHX to AUS?

ASSISTANT: Sure, we are ecstatic to help you. May I know on what dates would you like to travel?

USER: My travelling dates are Oct 21 and Oct 23.

ASSISTANT: Do you need any flag stop in between journey?

USER: No, I need a direct flight.

ASSISTANT: May I know your good name please?

USER: My name is Elizabeth Lopez.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I want to return in the afternoon.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Ok.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for approaching us, wish you a nice day.