You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER:  I would like to cancel my recent reservation because my health condition was not good, Can you help me?

ASSISTANT: Sure, may I know your good name?

USER: Sandra Campbell here.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.