You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Davis.

ASSISTANT: How can I assist you?

USER: I need to cancel my reservation, can you help me out please?

ASSISTANT: Sure, I will help you to cancel. Give me a moment to check. Sorry, there is no reservation found on your name to cancel.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Welcome. Have a nice day.