You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Stephanie Evans, can you help me to find a flight from CLT to BOS?

ASSISTANT: Sure, I am glad to help you in booking the flight ticket. May I know your planned travel dates?

USER: My planned travel dates are 06/18 and 06/20.

ASSISTANT: Ok, please allow me a moment to check for the flight availability.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: Sorry to say, there are no flights available for your desired dates.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for opting us.