You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Myself Catherine Roberts.

ASSISTANT: Ok.

USER: I am planning to visit Washington, will you help me in booking the flight ticket from PHX to IAD?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My preferable journey dates are May 09 and May 11.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable in any class.

ASSISTANT: May I know your arrival and depart timings?

USER: My return time must be in afternoon.

ASSISTANT: Do you have any more specifications?

USER: No, thank you for asking.

ASSISTANT: There are no flights found on your specified routes.

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

ASSISTANT: Thank you for availing us.