You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be at your  service?

USER: I am Michael Davis, I want to cancel my ticket, as my plan for vacation is cancelled due to my bad health.

ASSISTANT: Ok.

USER: Can you help me with that?

ASSISTANT: Sure. Thanks for waiting. There is no reservation on your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for choosing us.