You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Gary Thompson. I am planning to visit PHX to meet my father, can you please find a flight from  MCO?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Mar 27 and Mar 29.

ASSISTANT: Do you have class preference?

USER: I prefer economy class flight. I have changed my plans to business class flight, please check the availability.

ASSISTANT: Sorry, there are no flights are available for your desired dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.