You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: My name is Donna Roberts.

ASSISTANT: Yes Donna, how can I help you?

USER: Could you please help me to cancel my recent reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation by your name.

USER: That's ok. Thank you for the information.

ASSISTANT: Thank you and have a nice day.