You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Helen Hill. I want to cancel my recent reservation, can you please help me with it?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: Its ok, thank you.

ASSISTANT: Thank you.