You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Richard Roberts.

ASSISTANT: How can I assist you Roberts?

USER: I want to visit Land of OZ, I would like to book a ticket.

ASSISTANT: Sure, I'm glad to help you. Please let me know your airport codes.

USER: My airport codes are from DCA to CLT.

ASSISTANT: Can you help me with your journey dates please?

USER: My journey dates are from 09/11 to 09/13.

ASSISTANT: Richard, I found a flight with Spirit airlines and the flight number is 1012 with price 300.

USER: Ok, please confirm my booking.

ASSISTANT: Your ticket is booked. Thank you for using our services.

USER: Thank you for your help in booking my ticket.