You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket to Los Angeles CA-LAX. Could you please help me in booking?

ASSISTANT: Ok. May I know your origin airport code?

USER: My take off airport code is Washington DC-DCA.

ASSISTANT: May I know your trip dates?

USER: My trip dates are 08/11 and 08/13.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a stopover.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights on your requirements.

USER: Ok, no problem.

ASSISTANT: For documentation, may I know your name please?

USER: Thank you for your response. I am Thomas Carter.

ASSISTANT: Thank you for opting us, have a good day.

USER: Thank you.