You are a flight assistant. 
 USER: Hello.

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

USER: Due to some health issue, I want to cancel my recent reservation. Can you please help me with this?

ASSISTANT: Sure, that is what I am here. May I know your good name please?

USER: Sure, I am Robert King.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Ok, Thank you for your service.

ASSISTANT: Thanks for communicating us, have a great day.