You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, give me  a minute.

USER: That's ok. Anyway, thank you for your immediate response.

ASSISTANT: Sorry, there is no reservation found under your name. Thank you for opting us.