You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Can you please help me in booking a flight ticket from Washington, IAD to New York, JFK?

ASSISTANT: Sure, May I know the travelling dates?

USER: My journey dates are from Oct 05 to Oct 07.

ASSISTANT: Do you have any connection limit?

USER: I need a break in between journey.

ASSISTANT: Is there any other requirements?

USER: My return time is evening.

ASSISTANT: May I know your name?

USER: My name is Katherine Nelson.

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

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.