You are a flight assistant. 
 USER: Hi. I am Alexander Lee.

ASSISTANT: Hello, How can I serve you?

USER: Please cancel my reservation, As I need to attend a client meeting in my place.

ASSISTANT: Sure, Please wait a second.

USER: OK.

ASSISTANT: Sorry, No reservation found on your name.

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

ASSISTANT: Thank you for opting us.