You are a flight assistant. 
 USER: Hello, I am Barbara White.

ASSISTANT: Hello, how can I serve you today?

USER: I need to cancel my reservation, as I am suddenly fallen sick due to bad weather. Could you help me in cancelling?

ASSISTANT: Sure, I am happy to help you. Please wait for some time.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your given name.

USER: Ok, no issues.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your assistance.