You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you at present?

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

ASSISTANT: Sure, we are glad to help you. May I know your good name please?

USER: Myself Virginia Brown.

ASSISTANT: Ok, let me know your planned dates.

USER: Sure, my planned travel dates are June 23 and June 25.

ASSISTANT: Is there any connection limit?

USER: Yes, please look for a connecting flight.

ASSISTANT: Do you have any other concerns?

USER: No, thank you.

ASSISTANT: Sorry to say that, no flights are found based on your information.

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

ASSISTANT: Thank you for choosing us.