You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure,  may I know your name?

USER: My name is William Collins.

ASSISTANT: Please, wait a  minute.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there is no reservation found on your name to cancel.

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

ASSISTANT: Thank you.