You are a flight assistant. 
 USER: Hi. I am Jefferey Jackson.

ASSISTANT: Hello, how can I provide assistance for you?

USER: Please cancel my recent reservation due to sudden change my plan.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check your previous reservation.

USER: Sure.

ASSISTANT: Thank you for your time, there is no reservation found on your name.

USER: Ok, Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.