You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Myself Shirley Martin. I am looking for a flight from DFW to DEN, can you help you in booking the flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, my planned travel dates are 03/23 and 03/25.

ASSISTANT: Please  wait Shirley Martin.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry Shirley Martin, there is no flight with your  travel dates in your route.

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

ASSISTANT: Thank you for reaching us.