You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Carter from Dallas. I am planning to visit New York for a business meeting, can you please help me out with booking of a flight ticket from DFW to JFK?

ASSISTANT: William Carter, I am glad you have contacted us. I will help you. Please help me with your planned travel dates.

USER: Thank you. I want to take off on Aug 17 book my return ticket also on Aug 19.

ASSISTANT: Do you need a direct or connecting flight to travel?

USER: I want a connecting a flight.

ASSISTANT: William Carter, I am really sorry to inform you that there is no flight available as per your request.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a great day.