You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Raymond Davis. As my friend's wedding has been postponed, I need to change my reservation. Can you please help me?

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: We could not find any reservation on your given name.

USER: No problem. Thank you.

ASSISTANT: Thank you for availing us.