You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to book a flight ticket from JFK to IAD?

ASSISTANT: Sure, I am here to help you. Please help me with your planned trip dates.

USER: My trip dates are 03 and 05 of Sep.

ASSISTANT: Do you have any stopover in between journey?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name?

USER: I am William Allen.

ASSISTANT: Thanks for providing details, there is no flights are available on your journey dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.