You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Raymond Wright.

ASSISTANT: Glad to meet you Raymond.

USER: My trip dates are postponed, due to climatic conditions. Can you change my reservation?

ASSISTANT: Sure, I will help you with that. Please allow me a moment to check existing reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Sorry Raymond, no reservation has found under your name to change it.

USER: It's fine. Thank you for your help.

ASSISTANT: Most welcome. Thank you for choosing us. Have a good day.

USER: You are welcome.