You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: I need a direct flight to reach Boston as it is an urgent case, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know on which dates are you planning to travel?

USER: I have to depart on 18th Sep and planning to return back on 20th Sep.

ASSISTANT: Please help me with your source and destination airport code.

USER: I will prefer to start my journey from MCO and land at BOS.

ASSISTANT: Do you prefer either economy or business class?

USER: I'm comfortable with any class.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: No, I don't have any time preference.

ASSISTANT: Sorry to inform you that we don't have any direct flight available for you journey.

USER: No problem, thank you for the information.

ASSISTANT: May I know your name for the records please?

USER: My name is Michelle Miller.

ASSISTANT: Thank you for checking it with us.

USER: Thank you.