You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I assist you?

USER: I am Donna Scott. I am planning to construct a new business center at New York NY-EWR, help me in booking my flight ticket from TX-DFW.

ASSISTANT: Please provide your journey dates in order to book a ticket.

USER: Sure, 04/24 is my starting date, my return date is on 04/26.

ASSISTANT: No flights found for your requirement.

USER: Its ok, Thank you.

ASSISTANT: Thank you.