You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Jackson.

ASSISTANT: How can I serve you for the day?

USER: Please serve me in booking a flight ticket from MCO to IAH under 1000 price range.

ASSISTANT: Sure, let me know your travelling dates?

USER: Ok, my travelling dates are 09/16 and 09/18.

ASSISTANT: Can I know your destination airport code? Ok. Please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting. There are no flights found with the given details.

USER: Ok, not a problem. Thanks for the information.

ASSISTANT: Thank you for reaching us, hope we serve you next time.