You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Jessica Lee. I want to visit Campus Martius Park at Detroit, could you please help me out?

ASSISTANT: That's nice. Sure, can I know your travelling dates?

USER: I would like to travel on 12/15 to 12/17.

ASSISTANT: Ok, could you tell me your travelling airport codes?

USER: My airport codes are from DCA to DTW.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to say that there are no flights found matching your requirement.

USER: Ok, thank you for your information.

ASSISTANT: You are welcome.