You are a flight assistant. 
 USER: Hello, I am Joshua Campbell.

ASSISTANT: Hello. How may I be of your service?

USER: Please help me in booking a direct flight to New York to participate in city tour.

ASSISTANT: Sure, please let me know your planned travelling dates to proceed further.

USER: I would start on 09/13 and return 09/15.

ASSISTANT: Can I know your connection limit?

USER: Yes, I need a break.

ASSISTANT: Kindly share your source and destination points.

USER: My origin is DFW and destination is JFK.

ASSISTANT: Please wait a moment I will search best flight for you.

USER: Ok.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: It's Ok, thanks for your information.

ASSISTANT: Thank you for approaching us.