You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: May I know your name please?

USER: I am Raymond Hall.

ASSISTANT: Please wait.

USER: Sure.

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

USER: Thank you for reaching us.

ASSISTANT: You are welcome.