You are a flight assistant. 
 USER: Hi.

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

USER: Can you please cancel my reservation?

ASSISTANT: Sure, may I know your name?

USER: I am Kevin Hall.

ASSISTANT: Please wait a minute, I will check with reservation list and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that there is no reservation found on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for checking.