You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carol Smith.

ASSISTANT: How can I help you now?

USER: Can you cancel my recent reservation, which I have done previously.

ASSISTANT: Sure, I will help you with that. Please, wait for a while.

USER: Sure, take your own time.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: I did not find any reservation on your name to cancel.

USER: That's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.