You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Due to my ill health, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, may I know your good name please?

USER: My name is Jack Lee.

ASSISTANT: There is no reservation found under your name, Lee.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.