You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Justin Young.

ASSISTANT: How may I assist you today?

USER: Please reserve me a flight ticket from MCO to PHX.

ASSISTANT: Sure, can you please help me with your travelling dates?

USER: My preferable journey dates are Mar 18 and Mar 20.

ASSISTANT: May I know at which time you would like to travel?

USER: I would like to depart in the afternoon.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you want to fly with economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: There is no flights found with your given information.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.