You are a flight assistant. 
 USER: Hello,. I am Nicholas King.

ASSISTANT: Hello. How can I serve you?

USER: I want to cancel my recent reservation as my exam got cancelled. Please help me with cancellation.

ASSISTANT: Sure, I can help out with cancellation. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. We didn't found any reservation by this name.

USER: That's fine, thank you.

ASSISTANT: Thanks for choosing us.