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

ASSISTANT: Hello, how may I support you?

USER: I would like to attend Classical music event in Carnegie Hall at New York, LGA.

ASSISTANT: Ok.

USER: Can you help me with booking a connecting flight ticket?

ASSISTANT: Sure, I am gleeful to help you. How much you can afford for this journey?

USER: My fare is 500.

ASSISTANT: What are your planned trip dates?

USER: My travelling dates are from 02/09 to 02/11.

ASSISTANT: Please, provide your source code.

USER: My source code is DCA.

ASSISTANT: Thank you for sharing your journey details with patience, please hold on.

USER: OK.

ASSISTANT: Thank you for your time. Unfortunately, there is  no connecting flight available on your route.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.