You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you at this moment?

USER: Could you please book a flight ticket from DCA to IAH?

ASSISTANT: Sure, do you need a lay by in between the journey?

USER: Yes, I need a lay by.

ASSISTANT: Ok, do you prefer business or economy class?

USER: I am comfortable with any class.

ASSISTANT: On which dates would you like to travel?

USER: My journey dates are Jan 11 and Jan 13.

ASSISTANT: May I know your good name please?

USER: My name is Janet Anderson.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: We found a Hawaiian Airlines with fare of 100 and a lay by in between the journey matches your schedule. Can I proceed with booking?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been confirmed with flight number 1005.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.