You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am George Collins. As my plan to go for vacation has been postponed, I need to cancel my reservation. Can you please help me?

ASSISTANT: Sure. Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. No existing reservation was found on your name in the database.

USER: No problem. Thank you.

ASSISTANT: Thank you for opting us.