You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to cancel my reservation as I am unable to travel due to high fever, so please help me to cancel.

ASSISTANT: Sure, I will help you. Let me know your name, please.

USER: Ok. I am Jeffrey Williams.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, I could not find any reservation on your name.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for approaching us.