You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I am Mary Harris.

ASSISTANT: Ok.

USER: As I have fallen sick suddenly due to bad weather, I would like to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

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

USER: That's fine.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you for your help.

ASSISTANT: You are welcome.