You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Campbell.

ASSISTANT: How can I help you?

USER: I am planning to cancel my recent reservation, due to health issue.

ASSISTANT: Please wait a while.

USER: Can you please cancel my ticket? Sure.

ASSISTANT: Sure, I will help you.

USER: Thank you.

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

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for opting us. Have a nice day.