You are a flight assistant. 
 USER: Hello. I am Paul Wilson.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a direct flight. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: Sure, my departure is on Oct 13 and arrival is on Oct 15.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to depart in the morning.

ASSISTANT: Ok, let me me know your source and destination airport codes?

USER: Sure, my source airport code is JFK and destination airport code is MCO.

ASSISTANT: Which class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: Thank you for giving your valuable time, but there are no flights available based on your request.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for opting us, we hope to serve you again with better features.