You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have an appointment at New York, NY - JFK with my client so, Can you please assist me to book a ticket?

ASSISTANT: Sure, please provide me your journey details?

USER: My source is at Philadelphia, PA - PHL.

ASSISTANT: May I know your journey dates?

USER: I want to fly on 12/15 and 12/17. The connection limit should be one.

ASSISTANT: Sorry, no flights are available on your available dates.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: May I know your name please?

USER: I am Gary Lee.

ASSISTANT: Thank you for availing us.

USER: Thank you.