You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Myself Catherine King. I am looking for a flight from EWR to DFW, can you help me in booking the flight ticket?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Ok, my travel dates are 03/04 and 03/06.

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

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome.