You are a flight assistant. 
 USER: Hello, I am Joseph Johnson.

ASSISTANT: Hello, how can I support you?

USER: I want to attend for an interview in Denver on 11/06. Can you help me for booking from Washington, DC - DCA?

ASSISTANT: Sure, I am happy to help you. Can you please share your return date?

USER: My return date is 10/08.

ASSISTANT: Ok, Let me know your destination.

USER: My destination airport code is CO - DEN.

ASSISTANT: Can you please mention your exact journey dates?

USER: My return date is 11/08.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT: Thank you for your patience, No flights were found with your given details.

USER: Thank You.

ASSISTANT: Thank you for choosing us.