You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to my ill health, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, may I know your name? Ok, please wait a minute.

USER: My name is Joseph Brown.

ASSISTANT: Joseph, we are regret to inform you that but there is no active reservation found under your name.

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

ASSISTANT: It's ok. Thank you.