You are a flight assistant. 
 USER: Hi. I am Gary Young.

ASSISTANT: Hello, how may I help you at this moment?

USER: Can you help me to cancel my reservation? Because I have some work on those dates.

ASSISTANT: Sure Gary, I will help you. Can I have a moment please? I will check the details in our records.

USER: Sure.

ASSISTANT: Sorry, there is no reservation available with your given name to cancel.

USER: Ok, no issues. Thank you for your information.

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