You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: I have some personal matters that need fixing so I need cancel my recent reservation. Can you please help me in that?

ASSISTANT: May I know your name?

USER: My name is Joshua Evans.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: I'm sorry, no reservation found.

USER: That's not a problem.

ASSISTANT: Thanks.

USER: Thanks for your service.