You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation, help me with it.

ASSISTANT: Sure, may I know your name for checking purpose?

USER: Larry Campbell here.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry Larry Campbell, no reservation found on your name in our reservation list.

USER: No problem, thank you for your effort.

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