You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I would like to make a flight ticket reservation from DCA to ORD, can you please help me?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, my planned travelling dates are Sep, 08 and 10 respectively.

ASSISTANT: Do you have any connection limit?

USER: Flight has to be with single connection.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: Sure, my name is Christine Carter.

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

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for opting us.