You are a flight assistant. 
 USER: Hello, I am Emma Adams.

ASSISTANT: Hello, how can I support you?

USER: I want to celebrate valentine's day with my valentine.Can you please book a flight ticket to ORD?

ASSISTANT: Sure, may I know your connection and price limit?

USER: Price of flight should be below 500. Connection limit is 1.

ASSISTANT: Can you please share your journey dates?

USER: My travelling dates are from 02/13 to 02/15.

ASSISTANT: May I know your origin?

USER: My source code is CLT.

ASSISTANT: Thank you, for providing details. Sorry to say that, there is no connection airline regarding your given information.

USER: It's ok, thanks for the information.

ASSISTANT: Thank you, for choosing us.