You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Williams.

ASSISTANT:  How can I aid you?

USER: Can you please help me in booking a plane ticket with fare 200 to go for a round trip?

ASSISTANT: Sure, please provide me your journey dates?

USER: My journey dates are from 04/10 to 04/12.

ASSISTANT:  May I know your airport code?

USER: Minneapolis, MSP is my airport code.

ASSISTANT: Do you have any preferences?

USER: I need a lay by in between my journey.

ASSISTANT: We found a connecting flight Southwest with flight number 1009 and fare is 200. Shall I proceed?

USER: Please make it confirm.

ASSISTANT:  Your booking is done.

USER: Thank you for your help.

ASSISTANT:  Thank you for availing us.