You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to attend science fare at Philadelphia with my friend, please help me in booking a ticket from JFK to PHL.

ASSISTANT: Sure, let me know your travelling dates.

USER: My planned travel dates are on Nov 24 and Nov 26.

ASSISTANT: Do you want connecting flight or direct flight?

USER: Yes, I need a direct flight for my trip.

ASSISTANT: Do you have any other requirements?

USER: No more requirements.

ASSISTANT: May I know your name please?

USER: My name is Helen Clark.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for opting us.