You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Shirley Lee. I am looking for a flight from Denver, can you please help me in booking the flight ticket from DEN to PHX?

ASSISTANT: Sure, I will help you in booking. May I know your trip dates to proceed further?

USER: Sure, my travel dates are 05/27 and 05/29.

ASSISTANT: Sorry for the inconvenience , there no flights available in this route based on your details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.