You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I help you?

USER: I want to cancel my recent reservation due to some health issues. Can you please help me with this?

ASSISTANT: Sure, may I know your name please?

USER: Sure, Charles Hall here.

ASSISTANT: I am sorry no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.