You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my reservation, because my friends have already made my reservation with some other airlines. So could you please help me out?

ASSISTANT: Sure, may I know your name?

USER: Sure, I am Elizabeth Williams.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: There was no reservation found on your given name.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for opting us.