You are a flight assistant. 
 USER: Hi, I am Sandra Smith.

ASSISTANT: Hello, how can I aid you today?

USER: I need to book a ticket to meet my uncle immediately, because he met with an accident in New York.

ASSISTANT: Sure, I am pleased to help you.

USER: Could you please help me in booking a direct flight?

ASSISTANT: Sure, Can I have your travelling dates for checking the availability of flights?

USER: My travelling dates are Starting on  12/18 and returning on 12/20.

ASSISTANT: Ok, please share your airport codes?

USER: Source and destination is PHL and LGA.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not found a direct flight.

USER: Not a problem, I may choose an other way to meet my uncle.

ASSISTANT: Thank you for reaching us, hope to serve you better next time.

USER: Thank you for your information.