You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Brandon Brown. Can you help me in booking a ticket from MCO to DCA?

ASSISTANT: Sure, may I know your travel dates?

USER: My planning dates are from 10/16 to 10/18.

ASSISTANT: Please allow me a moment to check for the availability of flight on this route.

USER: Sure.

ASSISTANT: Brandon, I am sorry to inform you that there is no flight available at your request.

USER: It's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.