You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my existing reservation, due to some business meeting got cancelled. Can you help me for that one?

ASSISTANT: Sure, I will help you with that. Can I know your good name to proceed further?

USER: Sure, Mary Hill here.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name to change.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for availing us.