You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Could you book my ticket from IAH to LAS?

ASSISTANT: On which dates would you like to travel?

USER: My trip dates are Mar 20 and Mar 22.

ASSISTANT: May I know your good name please?

USER: Brian Robinson here.

ASSISTANT: Do you need a lay by in between the journey?

USER: I need 1 lay by in my journey.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: There is a 1003 American Airlines with fare of 200 and a lay by in between the journey matches your schedule. Can I proceed with booking?

USER: Please book my ticket.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.