You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: Karen Hall here. As I have fallen sick suddenly due to bad weather, I would like to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that. Please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Karen Hall, no reservation has found under your name to cancel.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us, have a good day.