You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Jessica Campbell.

ASSISTANT: How can I be at your service?

USER: I would like to plan for round trip with my friends. So can you please help me with book a direct flight?

ASSISTANT: Sure, I am here to help you. Can I have your trip dates?

USER: Sure, my journey dates are 04/25 to 04/27.

ASSISTANT: Help me with your airport abbreviates?

USER: My origin is from New York, NY - LGA to NY - JFK.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, we do not found any flights with your request. Thanks for reaching us.