You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to book a direct flight to New York, LGA to attend Film festival.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travelling dates are Mar 7 and Mar 9.

ASSISTANT: Ok, can you please provide your source airport code?

USER: My source airport code is OAK.

ASSISTANT: Ok, do you have any specifications?

USER: I prefer economy class.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight available for you.

USER: Ok.

ASSISTANT: May I know your name please?

USER: Sure, I am Kenneth Brown.

ASSISTANT: Sorry Kenneth Edwards, there are no flights available on your requested dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.