You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I want cancel my reservation, help me in that?

ASSISTANT: Sure, may I know your name?

USER: I am Alexander Lewis.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: ok, not an issue. Thank you.

ASSISTANT: Thank you for contacting us.