You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: Please book a ticket from Philadelphia, PA-PHL to New York, NY-JFK.

ASSISTANT: Sure, can you share your journey dates?

USER: Journey dates are from 05/20 to 05/22.

ASSISTANT: Do you have any specifications?

USER: Price limit 5000. Connections limit 1.

ASSISTANT: There is a connecting flight with number 1003 in airline Delta, the fare is 100.

USER: Please book a flight.

ASSISTANT: Can I book it? Your ticket is booked.

USER: Thanks.

ASSISTANT: May I know your name?

USER: My name is Ryan Adams.

ASSISTANT: Thank you for opting us.