You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: I am Raymond King.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Raymond King, there is no active reservation found under your name to do changes in that.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.