You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation due to health issues, can you please help me with that?

ASSISTANT: Please wait a while. May I know your name please?

USER: My name is Dennis Mitchell.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.