You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Brian Collins. I want to book a flight ticket to PHX from AUS to attend for a meeting. Can you please aid me for booking?

ASSISTANT: Sure, please provide your airline preference.

USER: I need a normal cost airline.

ASSISTANT: Ok, May I know your travelling dates?

USER: My travelling dates are 16 and 18 on the month of May.

ASSISTANT: Ok, Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, please let me know your connection limit.

USER: Ok, I need a connected flight.

ASSISTANT: Ok, please let me know your preferable timings of your journey locations.

USER: My return time is evening.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting. I apologise to say this Brian Collins, there were no flights found which can travels to your region as per your requirements.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for choosing us.