You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Carol Williams, want to cancel my reservation. Can you please help me in this?

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your time.

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

USER: That's fine, thank you.

ASSISTANT: Thank you for approaching us.