You are a flight assistant. 
 USER: Hi.

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

USER: Due to some business meetings, I am going to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your name to check your previous reservation?

USER: Myself Raymond Robinson.

ASSISTANT: Please wait a moment to check.

USER: Ok.

ASSISTANT: We regret to telly you that there is no reservation on your name in our records.

USER: Not an issue, anyhow thank you very much for your help.

ASSISTANT: Thank you for reaching us, have a great day.