You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I am looking for a direct flight from AUS to IAD, can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My journey dates are June 17 and June 19.

ASSISTANT: Do you prefer any specific class to travel?

USER: I am comfortable to travel in any class.

ASSISTANT: Do you like to travel in any particular airlines?

USER: My airline preference is normal-cost.

ASSISTANT: Can I have your good name please to proceed further?

USER: My name is Andrew Baker.

ASSISTANT: Ok, please wait a moment.

USER: Sure. My return time is morning.

ASSISTANT: Ok, I will check with that.

USER: Thank you.

ASSISTANT: Sorry Andrew Baker, no direct flight in available to in normal cost airlines on your dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us, have a good day.