You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I want to book a flight ticket from LGA to JFK. Can you please help me in that?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: My trip dates are Nov 15 to Nov 17.

ASSISTANT: Let me know about your connection limit, please.

USER: I need a direct flight.

ASSISTANT: Do you have any class preference?

USER: I prefer to travel in economy class.

ASSISTANT: May I know about your other preferences, if any?

USER: No.

ASSISTANT: Please, forward your name to proceed.

USER: Myself Lisa Scott.

ASSISTANT: Sorry to say that, there are no flights available on your given routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for opting us.