You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I serve you?

USER: Please book a ticket from Philadelphia, PA-PHL to New York, NY-LGA, for arts and crafts festival. I am Laura Jones.

ASSISTANT: Sure, may I know your price limit?

USER: Price limit is 500. Please provide direct flight.

ASSISTANT: Sure, let me know your journey dates.

USER: Departure will be 07/29 and return on 07/31.

ASSISTANT: Laura wait for a while, I will revert to you. Sorry for the inconvenience, I didn't found any flight on your route.

USER: Thanks.

ASSISTANT: Thank you for reaching us.