You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I'm Brenda Harris here. Can you book a ticket from AUS to DTW? As I'm planning to visit Detroit.

ASSISTANT: Sure, May I know the travel dates?

USER: Sure, my planned departure and return travel dates are 26th and 28th of March.

ASSISTANT: Please wait a minute.

USER: Sure, please search for the flights in which ticket fare doesn't exceeds 200.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for availing us.