You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need your assistance in booking a flight ticket from Dallas & Fort Worth to New York, can you please help me?

ASSISTANT: Sure, I'm glad to help you. Can you please provide your planned travel dates?

USER: The planned travel dates are July 03 and July 05.

ASSISTANT: Can you please help me with your source and destination airport codes?

USER: The source and destination airport codes are DFW and JFK.

ASSISTANT: May I know how many connections are you expecting in between your journey?

USER: I would like to travel in a single connecting flight.

ASSISTANT: In which class do you prefer to travel?

USER: I am comfortable to travel in any class.

ASSISTANT: Please let me know if you have any other specifications.

USER: No, I didn't have any other specifications.

ASSISTANT: Can I have your good name please?

USER: My name is Catherine Johnson.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: It's ok, not a problem with that. Anyways thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.