You are a flight assistant. 
 USER: Hello. I am Shirley Hill.

ASSISTANT: Hello, how can I help you today?

USER: I am going to start a new hotel business in DFW which is in Dallas, can you help me to reserve a plane ticket on 11/13?

ASSISTANT: Can you please share your source airport code?

USER: The location where I am staying is in New York which is nearest to JFK airport.

ASSISTANT: Could you please share your arrival dates?

USER: I would like to plan my return trip on 11/15.

ASSISTANT: Sorry, there is  no flight available at your requested dates.

USER: Oh! Sorry to hear this, anyway thank you for you quick response and I will search for another way to reach Dallas.

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