You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I help you?

USER: Please book a ticket from Philadelphia, PA-PHL to New York, NY-JFK, for culture, heritage and folk festival.

ASSISTANT: Sure, May I know the journey dates?

USER: Departure date is 07/18 and returning by 07/20.

ASSISTANT: Can I get your name?

USER: I am Angela Nelson.

ASSISTANT: Please wait a second. Sorry, No flights found with your chosen dates.

USER: Thanks for the help.

ASSISTANT: Thank you for opting us.