You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am planning to book a ticket from JFK to OAK. Can you please help me out?

ASSISTANT: Sure, I am mirthful to help you with that flight ticket booking. May I know your travelling dates, please?

USER: I am planning to travel on Mar 20 and return back on Mar 22.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am looking for a economy class.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name please?

USER: My name is Matthew Robinson.

ASSISTANT: Sorry  Matthew Robinson, we haven't found any flights based on your specifications.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us, have a great day.