You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How best can I aid you today?

USER: I want to cancel my reservation due to some health issues, so please assist me in cancellation.

ASSISTANT: Sure, I am happy to help you.

USER: Thank you for accepting my request.

ASSISTANT: For checking your reservation status, we need to know your name. So, can you please forward me your name?

USER: Sure, my name is Shirley Walker.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our database.

USER: Not a problem, thank you.

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