You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Sarah Miller. I would like to cancel my reservation, could you help me out?

ASSISTANT: Sure. Please hold on for a while.

USER: Sure, take your time.

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

USER: That's ok. Thank you, have a good day.

ASSISTANT: Welcome. Thank you for reaching us.