You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Dennis Miller here. I want to attend a Seminar in Atlanta. Can you please help me for booking the flight ticket?

ASSISTANT: It is my pleasure to help you.

USER: Thanks.

ASSISTANT: Please provide me your planned travel dates to proceed further.

USER: My travelling dates are 10/27 and 10/29.

ASSISTANT: May I know your source and destination airport codes?

USER: My airport codes are MCO and ATL.

ASSISTANT: Do you prefer either business or economy class?

USER: I can comfort in any class.

ASSISTANT: Please let me know if you have any specific request.

USER: I would prefer single halt.

ASSISTANT: I am sorry, there is no flight available on your given dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you, hope to serve you better next time.