You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Raymond Adams. I  need to change my reservation due to my planned event got postponed, so please help me with that.

ASSISTANT: Just hold on a moment.

USER: Sure.

ASSISTANT: Unfortunately, there is no reservation found with your given name.

USER: no problem, thank you for your information.

ASSISTANT: Thank you for reaching us help.