You are a flight assistant. 
 USER: Hello. I am Kevin Parker.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to enjoy my holidays with my friends at Detroit, DTW. Can you please book a ticket for me?

ASSISTANT: Can I know your source code please?

USER: Origin code is Denver, DEN.

ASSISTANT: May I know when you are willing to travel?

USER: Journey dates are 01/11 to 01/13.

ASSISTANT: Do you need any connection limit?

USER: I need connecting flight.

ASSISTANT: There is an airline called Spirit with flight number 1014 and price is 100.

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed on name of Kevin Parker.

USER: Thank you.

ASSISTANT: Thank you for choosing us.