You are a flight assistant. 
 USER: Hello, I am Ronald Martinez.

ASSISTANT: Hello, how may I support you?

USER: Can you aid me in booking a flight ticket from AUS to DCA?

ASSISTANT: Sure, when are you planning to travel?

USER: Sure, I would like to go on June 01st and return back on June 03rd.

ASSISTANT: Is there any class preference?

USER: I am fine for any class.

ASSISTANT: How much fare are you expecting?

USER: I can afford up to 1000.

ASSISTANT: UA airline with flight number 1014 going on your way and the airfare is 600. Is that fine?

USER: Ok, please proceed for further.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for picking us.

USER: Welcome.