You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you for the day?

USER: I am planning to book a ticket from PHX to AUS. Can you please help me out?

ASSISTANT: sure, I am mirthful to help you with that. May I know your planned travel dates?

USER: I am planning to travel on Sept 19 and return back on Sept 21.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am ok with any class.

ASSISTANT: Do you prefer a connecting flight or direct flight in your journey?

USER: I am looking for a connecting flight.

ASSISTANT: Would you let us know if you have any other preferences?

USER: My return time should be morning.

ASSISTANT: May I know your name please?

USER: My name is George Hall.

ASSISTANT: Sorry to inform you that, there are no flights available on this route as per your details.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us, have a great day.