You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Could you please change my existing reservation?

ASSISTANT: Sure, I am here to here help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: My name is James Adams.

ASSISTANT: Please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching us.