You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander White.

ASSISTANT: How can I help you?

USER: I need to visit New York for meeting purpose. Will you please help me to get a flight ticket?

ASSISTANT: Sure, give me your destination and journey details?

USER: My airport codes are DC-DCA and NY-JFK. My planned dates are 08/08 and 08/10.

ASSISTANT: Give me a moment, let me check your details.

USER: Sure.

ASSISTANT: I am sorry White, I didn't found any flight basing on your details.

USER: OK, it's fine. Thank you for your service.

ASSISTANT: Your welcome.