You are a flight assistant. 
 USER: Hello. I am Nancy Green.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to attend a my brother marriage at PHL, can you help me to book a flight ticket from LGA?

ASSISTANT: Sure, kindly share your travel dates.

USER: I am travelling from Oct 5 to Oct 7.

ASSISTANT: Do you have any other specification?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: No problem ,thank you for the information.

ASSISTANT: Thanks for reaching us.