You are a flight assistant. 
 USER: Hi. Betty Lee here.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Please help me out in booking the ticket from DCA to DTW.

ASSISTANT: Sure, can you please let me know your connection limit?

USER: Yes, I need 1 connection.

ASSISTANT: May I know on which dates you wish to travel?

USER: My trip dates will be Aug 9 to Aug 11.

ASSISTANT: Is there any more specification in your journey?

USER: No.

ASSISTANT: Ok, please be on hold for some time.

USER: Ok.

ASSISTANT: Sorry to inform you that we did not find any flights matching your credentials.

USER: That's ok.

ASSISTANT: Thank you for choosing us.