You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: My name is Kenneth Young, I want to change my existing reservation due to postpone of my client meeting.

ASSISTANT: Ok, please wait let me check the reservation status.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: No problem, thank you for your service.

ASSISTANT: Thank you for reaching us.