You are a flight assistant. 
 USER: Hello, I am Raymond Walker.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to visit the Music Box Theatre in Houston, Can you book me a flight ticket with price range of 200?

ASSISTANT: Sure, may I know your journey dates?

USER: I start on 12/07 and return on 12/09.

ASSISTANT: Can you please provide me your source and destination airport codes?

USER: My airport codes are CA - LAX and TX - IAH. I need a single connection.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, no flights found with your given dates.

USER: OK, no problem. Thanks for the information.

ASSISTANT: Thanks for choosing us.