You are a flight assistant. 
 USER: Hello, I am Michael Lewis.

ASSISTANT: Hello, how can I help you?

USER: I want to attend a business trip from NewYork, NY - LGA to Austin, TX - AUS. Can you book me a ticket with price range of 200?

ASSISTANT: Sure, Could you please provide your journey dates?

USER: I start on 06/21 and return on 06/23. I need a single connection.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, No flights were available with your given details.

USER: OK, no issue. Thanks for the kind response.

ASSISTANT: Thank you for approaching us.