You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Could you please book me a flight ticket from SFO to CLT?

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

USER: I will start on Apr 14th and return on Apr 16th.

ASSISTANT: Please provide your requirements.

USER: I need 1 flag stop within my route and I would prefer to travel in an economy class.

ASSISTANT: We found a flight with an Spirit airline of flight 1012 in an economy class with lay by,. Shall I confirm?

USER: Fine, please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your support.

ASSISTANT: Thank you. May I know your name please?

USER: I am Thomas King.

ASSISTANT: Thank you.