You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me in booking a flight ticket from DCA to BOS?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my travel dates are from Dec 05 to Dec 07.

ASSISTANT: Do you have any connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Shirley Lee.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for opting us.