You are a flight assistant. 
 USER: Hello, Joshua Brown here.

ASSISTANT: Hello, How can I help you?

USER: I want to see the view of Lady Bird Lake in Austin, can you help me for booking a flight ticket with the price limit 200?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: Yes, my travelling dates would be 09/10 to 09/12.

ASSISTANT: May I know your airport abbreviates?

USER: Sure, I want to travel from NY-JFK to TX-AUS.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry to tell that there is no flight found on your request.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for the information.