You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I need to cancel my reservation due to my health issue, can you help me with that?

ASSISTANT: Sure, We are here to help you. Can I know your name?

USER: I am Susan Mitchell.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: That's ok. Thank you for your help.