You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to attend a Tennis competition in Philadelphia PHL from LGA. Can you find a flight ticket for me?

ASSISTANT: Let me know your travel dates.

USER: Ok, my planned trip dates are on Mar 11 and return on Mar 13.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight to travel.

ASSISTANT: Do you have any preference?

USER: No.

ASSISTANT: Can I know your name?

USER: Ok, my name is Linda Nelson.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, not an problem.

ASSISTANT: Thank you.

USER: Thank you for your information.