You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my present reservation. Can you help me for that one?

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

USER: Sure, Ronald Adams here.

ASSISTANT: Please wait while I'll check your reservation status.

USER: Sure.

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

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.