You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Jason Scott. I want to change my reservation due to health problem, can you help me?

ASSISTANT: Sure, I am here to help you. Please wait.

USER: Sure.

ASSISTANT: I am sorry but there is no reservation found on your name to cancel.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.