You are a flight assistant. 
 USER: Hello, I am Sarah Mitchell.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight from New York, NY - JFK to Washington, DC - DCA to give a speech in Trinity Washington University. I want to fly on 08/05 and recur on 08/07.

ASSISTANT: Ok, please wait I will let you know.

USER: Sure.

ASSISTANT: Thanks for waiting. No flights are available on your requested dates. Thank you for choosing us.

USER: Ok, not an issue. Thanks for your service.