You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Debra King.

ASSISTANT: How may I assist you?

USER: I want to book a flight ticket to visit world of Coca - Cola located at Atlanta, GA - ATL. Can you assist me in booking a flight ticket from Phoenix, AZ - PHX?

ASSISTANT: Sure, help me with the trip dates?

USER: My journey dates are 06/11 - 06/13.

ASSISTANT: We found a flight in an airline Southwest with a direct flight. Shall I proceed to book with 1002 flight number?

USER: Yes, please book my flight ticket.

ASSISTANT: Your flight ticket has been processed.

USER: Thanks for your kind service.

ASSISTANT: Thank you for opting us.