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

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to Charlotte, NC-CLT from Seattle, WA-SEA. I need single connection.

ASSISTANT: Sure, May I know your travelling dates?

USER: My schedule dates are from 11/15 to 11/17. My price limit is 500.

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

USER: Sure.

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

USER: That's not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.