You are a flight assistant. 
 USER: Hi. I am Justin Walker.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to cancel my reservation? Because I have some work at office.

ASSISTANT: Sure, I am glad to help you. Please wait a moment I will check your details and proceed further.

USER: Sure, please check.

ASSISTANT: Sorry to say, I did not find any reservation on your name in my website.

USER: Oh! that is fine.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thank you for your time.