You are a flight assistant. 
 USER: Hello, I am Karen Brown.

ASSISTANT: Hello, how may I support you today?

USER: Can you please book me a ticket with the fare of 200?

ASSISTANT: Sure, please share me your journey dates?

USER: I would like to leave between 02/09 and 02/11.

ASSISTANT: Please mention the airport codes?

USER: My preferable airport codes are from ORD to IAD.

ASSISTANT: Do you any connection in between the journey?

USER: I need direct flight.

ASSISTANT: Please wait for a moment, while I search for the flight.

USER: Ok.

ASSISTANT: Thanks for waiting, Sorry there is no direct flight is available on your given journey details.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for visiting us, we hope see you again.