You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service from us are you looking for?

USER: I am a cop and I need a flight ticket booking from DCA to AUS in an economy class flight. Can you please book a flight ticket for me?

ASSISTANT: Sure, I am at your service.

USER: Thank you for considering my request.

ASSISTANT: May I know when are you planning to travel?

USER: Sure, I have planned to travel from July 04 to July 06.

ASSISTANT: Do you prefer any specific class to travel?

USER: I have already mentioned that I need an economy class flight.

ASSISTANT: Ok, may I know your connection limit?

USER: Check with single stop flight.

ASSISTANT: Sure, do you prefer any specific time to fly?

USER: I need a flight which will depart in the morning time.

ASSISTANT: Sure, is there any other preference do you have?

USER: No.

ASSISTANT: May I know your name to proceed further with the booking?

USER: My name is Linda Hall.

ASSISTANT: Sorry to inform you that we don't have any seat left in our flight en route to Austin.

USER:  No problem, thank you for your quick search.

ASSISTANT: Thank you.

USER: Welcome.