You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I address you?

USER: I am Shirley Evans. Book my flight ticket from PHL on 12/18 with a direct flight.

ASSISTANT: Ok, may I know your destination and return date?

USER: As, I am planning to attend my friends house warming occasion in New York, LGA. Price range is 500. I will return on 12/20.

ASSISTANT: Sorry to inform that no flights found with your requested details.

USER: Ok, no problem. Thank you for information.

ASSISTANT: Thanks for approaching us.