You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Carolyn Turner here. I would like to prefer a flight with lay-by option for my business trip to Houston. Can you book the flight ticket?

ASSISTANT: Sure, can you please share your airport codes?

USER: The airport codes are from DFW to HOU.

ASSISTANT: On which dates you would like to travel?

USER: The travel dates are from Jan 05 to Jan 07.

ASSISTANT: May I know your airline preference?

USER: No airline preference.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: There is a flight from United Airlines with a ticket fare 200, shall I proceed with booking?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your ticket has been reserved with the flight-1015 in economy class.

USER: Thank you.

ASSISTANT: Welcome, have a safe journey.