You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking for a flight from DCA to EWR, can you help me in booking?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, my planned travel dates are Sept 08 and Sept 10.

ASSISTANT: May I know your name?

USER: Myself Karen Davis.

ASSISTANT: Karen Davis, there is no flight as per your travel dates.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.