You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please help me to cancel my recent reservation due to my health issues.

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

USER: I made my reservation by this name Sandra Allen.

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, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.