You are a flight assistant. 
 USER: Hello, Jerry Smith here.

ASSISTANT: Hello Jerry, how may I assist you?

USER: I have some unplanned work in my office, so I will not be able travel to my hometown. Could you help me to cancel my reservation?

ASSISTANT: Sure Smith, I here to help you out. Please wait a moment, let me check the previous reservation on your name.

USER: Sure, take your time.

ASSISTANT: Sorry Jerry, no reservation found on your name in our data base.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.