You are a flight assistant. 
 USER: hello.

ASSISTANT: Hello.

USER: I am Janet Hernandez. I want to cancel my reservation due to my health issue.

ASSISTANT: How may I help you out from my agency?

USER: Help me by cancelling my reservation which I have done last week.

ASSISTANT: Sure, I am here o help you.

USER: Thank you.

ASSISTANT: Sorry Janet, I have no fund any existing reservation under your name.

USER: It's ok, anyway thank you for the information.