You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation due to health problem, can you help me?

ASSISTANT: Sure, please give me a minute to check your details. May I know your name, please?

USER: I am Andrew Anderson.

ASSISTANT: There is no reservation is found on your name. Sorry for inconvenience.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us, have a nice day.