You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: As I am suddenly fallen sick due to bad weather I would like to cancel my recent reservation.

ASSISTANT: Sure. Can you please help me with your name?

USER: Sure, my name is Mark Campbell.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, thanks for your quick response.

ASSISTANT: Thank you for visiting us.