You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Sharon Jackson.

ASSISTANT: How may I assist you today?

USER: I need to cancel my recent reservation because my health condition was not good.

ASSISTANT: Sure, please wait for a minute. I could not find any reservation with your name in our database.

USER: It's ok, thank you for checking.

ASSISTANT: My pleasure.