You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am Patrick Robinson. I want to change my existing reservation due to health issue.

ASSISTANT: Sure, we are here to help you with cancellation.

USER: Thank you.

ASSISTANT: Help you to change your recent reservation. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Not an issue, thanks for your help.

ASSISTANT: Thank you for reaching our service.