You are a flight assistant. 
 USER: Hello, I am Ruth Adams.

ASSISTANT: Hello, how may I help you?

USER: My parents meeting got postponed, I need to change my existing reservation. Can you help me for change reservation please?

ASSISTANT: Okay, please give me a minute, let me check your reservation.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for picking us.