You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Barbara Carter, I would like to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your own time.

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

USER: It's ok, thanks for your valuable information.

ASSISTANT: My pleasure.