You are a flight assistant. 
 USER: Hello, my name is Ryan Adams.

ASSISTANT: Hello. How can I serve you?

USER: Serve me in booking a flight ticket to Los Angeles, CA - LAX under 200 price.

ASSISTANT: Sure.

USER: Thanks.

ASSISTANT: May I know your travelling dates?

USER: 09/25 and 09/27 are my travelling dates.

ASSISTANT: Could you please share your source code?

USER: Oakland, CA - OAK is my source code.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need one connection.

ASSISTANT: Please, wait.

USER: OK.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Ok, no problem. Thanks for the kind information.

ASSISTANT: Thank you for choosing us.