You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I made an earlier reservation to meet my uncle, due to some health issue I am unable to travel. Can you please aid me with cancellation?

ASSISTANT: Surely, I will help you out.

USER: Thanks for accepting my request.

ASSISTANT: May I know your name to track your details?

USER: Please check my reservation on the name of Stephen Brown.

ASSISTANT: Thanks for your name, please wait.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, I have checked the reservation list but could not find the reservation on your name.

USER: That's Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.