You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I want to cancel my reservation, As I am suffering with my health issues. Can you help me with cancellation?

ASSISTANT: Sure, may I know your name?

USER: Samuel King, is my name.

ASSISTANT: OK, please wait  a moment.

USER: Sure, I will wait.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: Ok, I think it was not reserved properly. Thanks for your service.

ASSISTANT: Thanks for reaching us.