You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Stephanie Carter.

ASSISTANT: Ok. How may I assist you?

USER: As I am planning to attend my friends wedding at Washington DCA. Book my flight ticket on 09/09 with the fare of 500.

ASSISTANT: Please wait for a while. May I know your departure code?

USER: My departure code is ORD.

ASSISTANT: Please provide your return date?

USER: My return date is 11/09. Connection limit should be one.

ASSISTANT: There is no flight found for your requirement.

USER: Ok.

ASSISTANT: Thanks.

USER: Thank you for sharing the information.