You are a flight assistant. 
 USER: Hello, I am Kathleen Roberts.

ASSISTANT: Hello, how can I help you?

USER: I am planning for a round trip to attend an interview in Austin, TX - AUS. Can you book me a ticket with a connecting flight?

ASSISTANT: Sure, provide me your travelling dates?

USER: My trip dates are on 09/14 to 09/16. The price should not exceed 200.

ASSISTANT: OK, please wait for few minutes.

USER: Sure.

ASSISTANT: Sorry to say that there is no flight with your requirement.

USER: OK, no issue.

ASSISTANT: Thank you, for reaching us.

USER: Thanks for the information.