You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jack Hill. I want to cancel my recent reservation. Could you help me?

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your time.

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

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Most welcome.