You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Jeffrey Williams.

ASSISTANT: How can I assist you?

USER: I would like to cancel my reservation due to health issue. Can you please help me with that?

ASSISTANT: Sure, please give me a minute.

USER: Sure, take your time.

ASSISTANT: Jeffrey, there is no reservation available on your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: You are welcome.