You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself James Lewis.

ASSISTANT: How may I aid you today from my end?

USER: I am planning to visit my grand parents at Denver, will you help me in booking the flight ticket from PHX to DEN?

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

USER: My travelling dates are 02/24 and 02/26.

ASSISTANT: Sorry James Lewis, there is no reservation on your name in our database.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.