You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation, can you please help me in that?

ASSISTANT: Sure, can I know your name?

USER: My name is Donald Green.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.