You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation due to my musical show got postponed. Can you help me for this one?

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

USER: Sure, Brandon Anderson here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Brandon Anderson, there is no active reservation found under your name to do modifications in that.

USER: No issues, thank you for the time.

ASSISTANT: Thank you for choosing us.