You are a flight assistant. 
 USER: Hello. I am Raymond King.

ASSISTANT: Hello, how may I help you?

USER: We changed our holiday destination. Can you help me in changing my existing reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Raymond, there is no reservation found on your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your support.